Medical Forum / Diseases and Disorders / Cancer / March 2005
Participation in experimental treatments
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eveline - 03 Mar 2005 04:11 GMT participation in cancer trials offers benefits. People with advanced cancer who try experimental treatments are helped more than previously thought, according to a comprehensive look at government-sponsered tests over a decade. http://www.msnbc.msn.com/id/7067692
J - 03 Mar 2005 09:02 GMT > participation in cancer trials offers benefits. Here's another benefit. http://www.businessweek.com/ap/financialnews/D88HMV4G0.htm Oncolytics gets FDA OK for Reolysin trial
FEB. 28 2:22 P.M. ET Oncolytics Biotech Inc. said Monday that regulators cleared the company to begin a clinical trial of its Reolysin cancer treatment in patients with recurrent brain tumors.
Shares of the Calgary, Alberta-based company rose 21 cents, or 4.6 percent, to $4.78 in afternoon trading on the Nasdaq.
The biotechnology company said the Phase I/Phase II trial will study the safety of a single dose of Reolysin administered intravenously in up to 30 patients who have not responded to traditional treatments. Up to 14 patients will be added when a maximum tolerated dose is determined.
J - 03 Mar 2005 09:10 GMT > participation in cancer trials offers benefits. People with advanced cancer > who try experimental treatments are helped more than previously thought, http://www.cancerguide.org/clinical_trials.html CancerGuide: Clinical Trials and Experimental Treatments Clinical trials are conducted within a complex system with fairly well defined rules. A good understanding of the system gives you a framework for making good decisions. It also gives you an essential framework for understanding clinical trial results reported in the medical literature. There are can find brief superficial explanations of the sytem in many sites. My approach is to give you a detailed and intensely patient oriented tour specifically designed to help you find the best treatment.
Understanding the details will help you:
* Ask the best questions about trials you're considering * Know which kind of trial is likely to be appropriate and more quickly weed out inappropriate trials * Recognize promising trials * Recognize unpromising trials * Give you other options if eligiblity or randomization is making it hard to get the treatment you want * Maximize your odds through strategic thinking
In this article I set the stage with a brief introduction to the system, and then link you to CancerGuide's detailed Phase by Phase Guides. If you're already somewhat familiar with clinical trial phases you may want to skip directly to the detailed guides. A Few Important Principles
As you go through CancerGuide's clinical trial articles, there are a few general principles which you'll want to keep in mind which will help you put it all together. Promise and Uncertainty
I talk much about things being more or less promising based on the data, but often you just can't tell. When considering previous results of new treatments there is almost always great uncertainty. Often the data simply do not exist to suggest a new approach is truly promising and you may be unable to determine whether a particular trial is promising or not. Don't expect to be able to come to a definite conclusion about each and every trial - or even most of them. But when there are data suggesting there is real promise, and when you find that data, understand it, and act upon what you find, you may change your odds by getting the best treatment!
Each Option Must Be Compared to All Others
Although I describe strategies for investigating and thinking about each phase of trial, in reality, to find the best, any treatment option must be evaluated in the context of all other options. The alternative to a Phase I trial is not just another Phase I trial, but any other trials you are qualified for as well as any standard treatments which might be of value. It is impossible to know if something is promising unless you know what results can be expected with standard therapies. Variations on a Theme
Trials can vary from the standard or classic model, and a surprisingly large number of trials are non-standard in one way or another. I describe the standard and some of the variations for each phase of trial, but I can't hope to cover all of the possiblities. But understanding the standard cases will help you figure out how to understand and evaluate trials even when they don't quite fit the classic mold.
The System In a Nutshell Phase I Trials
* In a Phase I Trial, the first phase of testing, a new drug or treatment is tried in humans for the first time ever. The goal of the Phase I trial is not to see how well a new treatment works but rather just to discover how much of the drug can be given safely, and to understand its side effects and chemistry in the body. These trials most closely fit the stereotype of a truly experimental treatment. Phase I trials are for patients with advanced cancer who have no effective standard treatment.
Steve's Advice In a Nutshell The limited experience with the treatment normally makes it extremely difficult to evaluate the promise of the treatment, and there is a significant risk of getting an inadequate dose, even if the treatment is effective. Phase I trials are open to some patients who don't qualify for Phase II trials, and very carefully selected Phase I trials can be promising, but most patients who qualify for other trials would be well advised to avoid Phase I trials.
Phase II Trials
* In a Phase II Trial, the new treatment is tested to see if it can shrink tumors in patients with a particular type of cancer using the dose and schedule set during the prior Phase I trial. This is the first test of efficacy. Like Phase I trials, Phase II trials are for patients with advanced cancer, but Phase II trials also have some additional entry requirements.
Steve's Advice In a Nutshell Phase II trials offer the opportunity to get a new treatment at the correct dose, and without the uncertainties of randomization. The amount of prior evidence for a treatment in Phase II is highly variable, but can be enough to suggest the trial is promising. In my judgement if you have advanced cancer, your greatest chance to benefit from a new treatment through a clinical trial is probably a Phase II trial, but the trial must be carefully selected. Phase III Trials
* In a Phase III Trial, the new treatment is compared to the standard treatment to see which produces better survival. Phase III trials are normally randomized - half the patients are randomly selected to get the new treatment, and half the standard treatment. The survival of the two groups is then compared to determine which treatment was best. In some cases, Phase III trials compare two standard treatments or two new treatments. Phase III trials are not limited to patients with advanced cancer, but may be a consideration at any stage.
Steve's Advice In a Nutshell Phase III trials are randomized, which means you don't know what treatment you will get until after you enter and you are randomly assigned to an arm of the trial. This complicates the decision making! In an ethical Phase III trial, the evidence shouldn't favor one treatment to the degree that the outcome is a forgone conclusion, but it is still quite possible that a rational analysis of the trial in light of your values would conclude that one arm is more desirable. Phase III trials involve better established treatments than earlier phase trials and there should be more available evidence on the treatments involved than is the case for earlier phase trials. Phase III trials can offer the chance for an improved treatment, but require very careful strategic thinking.
Adjuvant Trials
* Adjuvant Trials are tests of additional treatment intended to reduce the risk of recurrence after initial treatment (usually surgery) for apparently localized disease. Most adjuvant trials are basically a special type of Phase III trial, and are randomized, but the considerations in choosing one are different enough that they deserve a separate discussion.
Steve's Advice In a Nutshell You only get one crack at adjuvant therapy, so you need to investigate adjuvant trials before starting any standard adjuvant therapy! You also have to enter the trial within a limited time after completing the primary treatment and sometimes even before starting the primary treatment, so you must investigate these trials promptly. Your decision must take into account your risk of recurrence, the side effects of treatment, whether there is any standard adjuvant treatment, and the specific evidence for the treatments used in any particular trial.
Regulatory and Institutional Aspects in Brief
Human Subject Protection
Clinical trials are governed by a complex bureaucracy and process designed to protect people from unethical research. CancerGuide does not dwell on regulatory protections because I believe that your best protection is to become deeply informed! But you should know that all reputable clinical trials are approved by a local Institutional Review Board to ensure that they meet minimum nationally established ethical standards. This includes ensuring that trials do not seriously harm patients solely for the purpose of gathering research data, that the risks are appropriate considering the situation, and that patients who participate in a trial give their informed consent through a process which culminates in signing an informed consent document. For advice on how to get the most out of informed consent, see my article, A Guide to Informed Consent for The Active Patient Regulation of Experimental Drugs and Devices
In the US, to use any drug or device that is not approved for general marketing (e.g. "experimental") researchers must obtain a permit called an IND. An IND is approval to use an experimental drug usually in a clinical trial, but it does not mean the FDA has approved the treatment for general use or even that it thinks the treatment has merit. Occasionally I see drugs or nutritional supplements touted as "FDA approved" when the only approval is an IND for use in clinical trials. Eligiblity Criteria
A notable and important feature of the clinical trial system is the strict and complex set of eligiblity criteria for each trial. Understanding this aspect of the system will make it much easier to figure out which trials you qualify for. The eligiblity criteria are include relatively standard requirements for all trials as a whole, some requirements which are typical of each phase trial, as well as many requirements which are specific to a particular trial. I cover the standard phase specific requirements in my detailed article on each phase of trial.
Next Steps Steve's Strategic Clinical Trial Guides: Phase by Phase
(see more) there and...
he goes on to cite a testicular cancer patient, which is germ cell...curable.
Phase I and II also measure for toxicity.
J - 03 Mar 2005 09:51 GMT > > participation in cancer trials offers benefits. People with advanced cancer > > who try experimental treatments are helped more than previously thought, [quoted text clipped - 22 lines] > The Active Patient > Regulation of Experimental Drugs and Devices <snipped> http://www.phrma.org/publications/publications/2004-06-30.1035.pdf (excerpts) This document is effective from October 1, 2002.
The Pharmaceutical Research and Manufacturers of America (PhRMA) represents research-based pharmaceutical and biotechnology companies. Our members discover, develop, manufacture and market new medicines and vaccines to enable patients to live longer and healthier lives. The development of new therapies to treat disease and improve quality of life is a long and complex process. A critical part of that process is clinical research, the study of a pharmaceutical product in humans (research participants).
We conduct clinical trials in accordance with applicable laws and regulations, as well as locally recognized good clinical practice, wherever in the world clinical trials are undertaken. When conducting multinational, multi-site trials, in both the industrialized and developing world, we follow standards based on the Guideline for Good Clinical Practice of the International Conference on Harmonization.
c. Training of Investigators. Investigators and their staff are trained on the clinical trial protocol, pharmaceutical product, and procedural issues associated with the conduct of the particular clinical trial.
d. IRB/EC Review. Prior to commencement, each clinical trial is reviewed by an IRB/EC that has independent decisionmaking authority, and has the responsibility and authority to protect research participants.
? The IRB/EC has the right to disapprove, require changes, or approve the clinical trial before any participants are enrolled at the institution or investigative site for which it has responsibility. ? The IRB/EC is provided relevant information from prior studies, the clinical trial protocol, and any materials developed to inform potential participants about the proposed research.
e. Informed Consent. We require that clinical investigators obtain and document informed consent, freely given without coercion, from all potential research participants.
f. Clinical Trial Monitoring. Trials are monitored using appropriately trained and qualified individuals. The sponsor will have procedures for these individuals to report on the progress of the trial including possible scientific misconduct. ? These individuals verify compliance with good clinical practices, including (but not limited to) adherence to the clinical trial protocol, enrollment of appropriate research participants, and the accuracy and complete reporting of clinical trial data. ? If a sponsor learns that a clinical investigator is significantly deficient in any area, it will either work with the investigator to obtain compliance or discontinue the investigators participation in the study, and notify the relevant authorities as required.
h. Privacy and Confidentiality of Medical Information. Sponsors respect the privacy rights of research participants and safeguard the confidentiality of their medical information in accordance with all applicable laws and regulations.
Clinical investigators and institutions should not be compensated in company stock or stock options for work performed on individual clinical trials.
Availability of clinical trial results in a timely manner is often critical to communicate important new information to the medical profession, patients and the public.
We design and conduct clinical trials in an ethical and scientifically rigorous manner to determine the benefits, risks, and value of pharmaceutical products. As sponsors, we are responsible for receipt and verification of data from all research sites for the studies we conduct; we ensure the accuracy and integrity of the entire study database, which is owned by the sponsor. a. Communication of Study Results. Clinical trials may involve already marketed products and/or investigational products. We commit to timely communication of meaningful results of controlled clinical trials of marketed products or investigational products that are approved for marketing, regardless of outcome. Communication includes publication of a paper in a peer-reviewed medical journal, abstract submission with a poster or oral presentation at a scientific meeting, or making results public by some other means.
Some studies that sponsors conduct are of an exploratory nature (early-phase or post-marketing). These are often highly proprietary to the sponsoring company,and due to their limited statistical power, serve primarily to generate hypotheses for possible future trials.
Sponsors do not commit to publish the results of every exploratory study performed, or to make the designs of clinical trial protocols available publicly at inception, as in a clinical trials registry. If the information from an exploratory study is felt to be of significant medical importance, sponsors should work with the investigators to submit the data for publication.
In all cases, the study results should be reported in an objective, accurate, balanced and complete manner, with a discussion of the strengths and limitations of the study.
c. Related Publications. For a multi-site clinical trial, analyses based on single-site data usually have significant statistical limitations, and frequently do not provide meaningful information for health care professionals or patients and therefore may not be supported by sponsors. Such reports should not precede and should always reference the primary presentation or paper of the entire study.
d. Investigator Access to Data and Review of Results.
As owners of the study database, sponsors have discretion to determine who will have access to the database. Generally, study databases are only made available to regulatory authorities. Individual investigators in multi-site clinical trials will have their own research participants data, and will be provided the randomization code after conclusion of the trial. Sponsors will make a summary of the study results available to the investigators. In addition any investigator who participated in the conduct of a multi-site clinical trial will be able to review relevant statistical tables, figures, and reports for the entire study at the sponsors facilities, or other mutually agreeable location.
g. Provision of Clinical Trial Protocol for Journal Review. If requested by a medical journal when reviewing a submitted manuscript for publication, the clinical trial sponsor will provide a synopsis of the clinical trial protocol and/or pre-specified plan for data analysis with the understanding that such documents are confidential and should be returned to the sponsor.
Are there ever times when it would not be appropriate to publish results from a hypothesis-testing clinical trial?
There are some situations where publication of results from a hypothesis-testing clinical trial would not be appropriate, and which have nothing to do with whether the study is positive or negative with regard to the performance of the sponsors product.
Examples are provided below. 1. Studies occur in which the data are found to be invalid. There is an implicit assumption that the data collected in a clinical trial will be valid, but sometimes this turns out not to be the case.
For example, there might be an erroneous laboratory assay or equipment malfunction, or disruption of study sample shipment rendering test data using these samples unreliable. Publication of results based on invalid data is inappropriate as it could adversely affect physician and patient decisions (invalid results could appear positive for the product or intervention, for example). However, sponsors want to be clear that valid results which do not support the hypothesis being tested, or which are contrary to the sponsors preferred outcome, should be published, because they are meaningful. In other words, negative results do not mean invalid results.
2. A study may not answer the question(s) for which it was designed. For instance, a study may be ended prematurely and the amount of data gathered is insufficient to draw conclusions (e.g., when preclinical data become available after a trial has been initiated and the sponsor must terminate the trial well before its planned conclusion). This is an example of a failed clinical trial. Frequently these types of studies are not accepted for publication by medical journal editors, but the sponsor should review the data with the study investigators to determine whether they warrant submission for publication or are otherwise meaningful.
The Principles refer to communication of trial results, either by publication in a peer-reviewed journal, presentation at a medical meeting, or making results public by some other means.
Why dont the Principles just say that sponsors commit to publish all clinical trial results in peer-reviewed medical journals? While publication of study results in a peer-reviewed medical journal (such as the New England Jounal of Medicine, JAMA or Lancet) is the preferred method of communication, this is not always possible. These journals are independent and, with the assistance of recognized experts in the relevant fields (peer reviewers), make their own determination about what to publish, and when. Some medical journals accept less than 10% of the manuscripts submitted to them. Manuscripts may be rejected for a variety of reasons, including lack of interest, lack of novelty, or inconclusive results. Consequently, the Principles provide some alternatives for the communication of clinical trial results. For instance, clinical trial data can be made public through presentation of the results at a professional scientific meeting, which involves oral presentations
During the clinical trial, sponsors are obligated to record and evaluate all safety information they receive from investigators or from any other source. If a sponsor receives adverse event information that suggests a potential significant safety concern for the sponsored trial, the sponsor must notify all investigators in the trial and the health authorities in an expedited fashion. For example, in the U.S. and some other countries, sponsors must report unexpected serious adverse events within 15 days, and life-threatening adverse events within 7 days.
J - 03 Mar 2005 09:57 GMT > http://www.phrma.org/publications/publications/2004-06-30.1035.pdf (excerpts) > This document is effective from October 1, 2002. > > Clinical investigators and institutions should not be compensated in company stock > or stock options for work performed on individual clinical trials. Under these principles, may a clinical investigator who owns stock in Company A be employed to conduct a clinical trial sponsored by Company A? Yes. Ownership of stock in the sponsoring company does not disqualify the investigator from participating in clinical research for the company. However, sponsors may not compensate investigators with stock or stock options for work performed on individual clinical trials. Under the laws and regulations of some countries, stock ownership by investigators may need to be disclosed to regulatory authorities.
eveline - 05 Mar 2005 20:39 GMT > participation in cancer trials offers benefits. People with advanced cancer > who try experimental treatments are helped more than previously thought, > according to a comprehensive look at government-sponsered tests over a > decade. > http://www.msnbc.msn.com/id/7067692 In the above studies, in 3% the cancers disappeared, 8% had substantial shrinkage, 34% had some shrinkage or stabilized. 14% had at least one serious side effect. From my reading it seems overall 11% were helped and in some cases 27% were better off. Each person would need to evaluate their circumstance and make an informed decision - after asking losts of questions. This would be after trying other recommended treatments, without adequated results, I would think.
My spouse was in a drug trial for acute asthma that periodicly accelerated to status asthmaticus - a very dangerous scenario. He was in acute distress during the trial, as he seemed to get the placebo. The drug he received after the early phase of the trial ended really made the difference and he was soon free of the intense attacks.
I would think in the cancer trials, you would want to be sure to receive the drug - not the placebo. I tried to get him into an Alzheimer trial but he was not accepted as his case was too advanced. BUT he would have wanted to try it. I would not have insisted he do a trial - nor would I have tried to talk him out of participating.
Those who participate help research and further generations, and many times - themselves. That's how progress is made. Some are more altruistic than others and feel participating will bring some good from having this bad illness.....helping future generations.
Some choose not to go further - have had enough - and that should be their choice without pressure from anyone..
The decisions need to be made by each individual, with all pertinent information at their disposal.
Me........... I don't know what I would do. I would have to be faced with all the bad news and drug facts to come up with an answer. I would make the decision myself, though.
eveline
J - 05 Mar 2005 23:57 GMT > I would think in the cancer trials, you would want to be sure to receive the > drug - not the placebo. Most Phase III and adjuvant trials are randomized. You don't get to choose. http://www.cancerguide.org/trials_phase3.htm J
Steph - 05 Mar 2005 23:58 GMT >> participation in cancer trials offers benefits. People with advanced > cancer [quoted text clipped - 23 lines] > the > drug - not the placebo. That's entirely wrong. The whole point of a placebo controlled trial is that it isn't known whether the new therapy is better (or worse) than placebo.
eveline - 06 Mar 2005 01:40 GMT > >> participation in cancer trials offers benefits. People with advanced > > cancer [quoted text clipped - 27 lines] > The whole point of a placebo controlled trial is that it isn't known whether > the new therapy is better (or worse) than placebo. Well I am not an expert and don't claim to be, but my research indicates that because of ethical concerns, only a few trials use no treatment placebos.
Some trials have equally plausable treatments so have no control arm. It would be unethical not to be using some treatment. The patient should know up front if they might be the one getting a no treatment placebo. That's the reason the patient should ask questions.
There are usually two arms of treatment with the new drug as one arm and a conventional treatment as the other. Some trials use two new drugs. One with more potency and maybe more side effects than the other.
Some trials have several arms of treatment. That leaves the patient with more guessing about what drug they might get. I am just saying the patient should ask questions and be informed and then decide for themselves .
I have a lot of concerns here. Another daughter is being tested for endometrial cancer.
eveline
Steph - 06 Mar 2005 02:10 GMT >> >> participation in cancer trials offers benefits. People with advanced >> > cancer [quoted text clipped - 57 lines] > > eveline The whole point of randomised double blind trials is that any bias is minimised. If either the patients or researchers know who is getting what, the trial is flawed. In any trial, if one arm is known to be better than the other(s) the trial would not be allowed by an ethics committee.
eveline - 06 Mar 2005 02:31 GMT > >> >> participation in cancer trials offers benefits. People with advanced > >> > cancer [quoted text clipped - 63 lines] > In any trial, if one arm is known to be better than the other(s) the trial > would not be allowed by an ethics committee. <<<<<<< I realize most are randomized and double blind trials with USUALLY some type of control arm, but doctors can differ about which drug is the best or more effective. As long as the choice of the better one is uncertain, there is no ethics problem.
The patient can't know what drug he/she is put on, as that would invalidate the results. However he or she has the right to know the selection of drugs offered and their merit. As the patient will be getting one of those. I would want to know the selection.
Thanks for your input. eveline
Steph - 06 Mar 2005 05:39 GMT > <<<<<<< > I realize most are randomized and double blind trials with USUALLY some > type > of control arm, but doctors can differ about which drug is the best or > more > effective. But the trial is passed by an ethics committee, not and enthusiastic researcher
> As long as the choice of the better one is uncertain, there is no ethics > problem. True
> The patient can't know what drug he/she is put on, as that would > invalidate [quoted text clipped - 3 lines] > As the patient will be getting one of those. I would want to know the > selection. You just agreed that would invalidate the trial.............
> Thanks for your input. > eveline bj - 06 Mar 2005 15:42 GMT I don't know if this is what the OP meant, but I would at least want to know what the entire menu had, even if I didn't know which choice I got. bj
>> The patient can't know what drug he/she is put on, as that would >> invalidate the results. [quoted text clipped - 4 lines] > > You just agreed that would invalidate the trial............. eveline - 06 Mar 2005 16:04 GMT > > <<<<<<< > > I realize most are randomized and double blind trials with USUALLY some [quoted text clipped - 22 lines] > >>>>>> >Absolutely not!! Faced with a cancer that has been treated with the usual treatment without success, this patient is looking at trials for help. In order to agree to enter this trial the patient or their advocate needs to know what type medicines have been selected for each trial to allow them to make an educated decision. It will help them decide to which trial they prefer to apply....or not. Each trial will have a different drug or drugs. Some may offer two new drugs, or one new one and the conventional treatment as a control arm ...or other set-ups. The patient has a right to know that scenario.
If it was my body, I would want to know the merits of all the drugs being used in the trial, since I would not know which one I might happen to get. What's wrong with that?Knowing all the drugs that were going to be used and their merits would not invalidate the trial. The patient would still not know which one that would be used for them. Doctors and trial clinitions are not Gods and each patient needs to be fully informed and make educated decisions for their own best welfare.
Clinical trials are important endeavors but each patient has value and worth.
Steph - 06 Mar 2005 17:04 GMT >> > <<<<<<< >> > I realize most are randomized and double blind trials with USUALLY some [quoted text clipped - 47 lines] > fully > informed and make educated decisions for their own best welfare. When did I disagree with that? Or is tha a strawman argument?
> Clinical trials are important endeavors but each patient has value and > worth. When did I disagree with that? And of course all patients in trials need to understand the trial design, and the treatment being used. That's "informed consent" which is at the ethical root of all trials (and all treatment). But the point is not that you wanted to understand the trial, but that you wanted to determine which treatment arm to be in. In a double blind randomised trial, that's not going to happen, for the reasons we've discussed.
Now give over with the "clinicians are not gods" attacks
eveline - 06 Mar 2005 18:18 GMT > >> > <<<<<<< > >> > I realize most are randomized and double blind trials with USUALLY some [quoted text clipped - 59 lines] > But the point is not that you wanted to understand the trial, but that you > wanted to determine which treatment arm to be in. ,,,,,, Steph, What you just wrote is an absolute untruth.!! Never did I say that I wanted to determine what treatment arm to be in~!!!! I want the patient instead to be able to select a trial that has no "no treatment placebos" included or drugs they would prefer not to try.
> Now give over with the "clinicians are not gods" attacks ........ Steph, I am a nurse and have worked with many doctors. Many with good intentions but none infallible. Just stating the facts - not an attack. Instead I feel I am being attacked for suggesting the patient be informed, and mentioning the benefits of chemotherapy instead of the treatment you are involved in giving.
Your trying to find fault with my reasoning will not change the basic facts. Twisting my words will not make the twisted version true. eveline
Steph - 06 Mar 2005 18:52 GMT > ........ > Steph, I am a nurse and have worked with many doctors. Many with good [quoted text clipped - 8 lines] > Twisting my words will not make the twisted version true. > eveline I hear an axe grinding
eveline - 06 Mar 2005 19:20 GMT > > ........ > > Steph, I am a nurse and have worked with many doctors. Many with good [quoted text clipped - 10 lines] > > I hear an axe grinding Steph, You might know better than me about axes, for I am retired, and only concerned about my many family members who have cancer and more broadly about patient issues in general. Having been a nurse and 'patient advocate' for many years, it is hard not to have concerns in that arena. I am still working on the theme and premise that doctors, nurses and other health professionals have used as a guideline for many years. FIRST DO NO HARM and that can also mean trying to see patients are not discouraged from getting any treatment that might help. I have no ax to grind, except the one I use in my wooded acreage to split wood for my fireplace.
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