I refer you to:

   http://email.eva.mpg.de/~paabo/pdf1/Kaessmann_DNASeqNatGen.pdf

  The study examined the entire genome to see how various ones around
the world related - this is in reference to the study of human
migration.   The area was chosen to be 1.1 Mb away from the nearest
known gene, so that there would be no question of differential survival
rates confusing the issue.   The question occurred to me whether the
area of the genome studied might have a non-coding gene.   Of course,
perhaps, it is extremely unlikely the authors would have been unaware
of this problem, but then, there is no point in a report in worrying
about everything that _might_ cause problems.  Probably enough that are
likely to.
    So, I wondered if anyone here would care to read the article and
comment.
     REgards
       John lGW