I went yesterday. IT was very informative. There are 13 genes that MIGHT cause PD but not by themselves the statistical evidence seems to indicate.
Researcher Jeff Bronstein MD. PHD MDS, seems to think it will eventuallly be proven that its a combination of factors that cause PD. HE pointed out that PD was first identified in 1817, long before the invention of pesticides. All that statistical evidence proves now is that you have a somewhat greater chance to contract PD with continued exposure to a given insecticide. HE pointed out that the 3% who do get symptoms, 97% do not.

Cann't recall his reasoning but he also said that those who contract PD at 50 or younger PROBABLY have a genetic predisposition for it. Sorry I cannot decipher my notes!!

CHarlie