I'm sure you'll have lots of replies now.
  Or you could look at the history file dating back to 1998. Search
e.g. epilepsy&heredity or seizures&genetics.
  Although it's no more numerically scientific necessarily, we've had
*1 person post here (pre 2000) who had a family history of more than 2
people who had seizures with a genetic component.   She hasn't posted
since about that date (1999).  Many of the other onsets are from
childhood effects, accidents or injury, or one of several infections,
or undetermined sources (so far).  That's why above history search
might pull up some of the older threads if they're still archived.
  Current post volumes (you'll see) are down to less than about 20 a
week from 40 per day, from a student who passed through mid-December,
spoofing some of the regular's addresses and posting trash.  I suspect
many of those regulars, who were active at the time, have just deleted
the group rather than wait for him to be taken offline (as he probably
is now).   Those volumes haven't returned to that level yet 5-6 weeks
later. That would have helped as we had about 11+ timezones
represented, and none of them are currently posting.   G./