[jjeaff]

My grandmother had 10 siblings. They grew up farming and they picked cotton every summer. Of the 11 siblings, I believe 8 of them have parkinsons. They have long thought exposure to whatever pesticides were used on the cotton may have caused the parkinson's late in life. I believe the siblings that don't have parkinsons were those that for whatever reason, had much less exposure to the cotton. Both parents lived pretty long and neither had the disease. There are two sets of twins, one identical, one fraternal. I'm not sure which of those have it. I've long thought that a case study could be made just about that family of 13.