To: Janet Paterson From: Will Kuipers Re: Heredity Dear Janet, Your post reported on an interesting and extensive study on twins and came to the conclusion that in most cases of PD heredity can be ruled out as a probable cause. I have strong indications that there are in my family three cases among close relatives. Wouldn't you say that in light of the study those were quite large odds? The people involved are myself, my sister and an uncle on my mothers side. Greetings, Will Kuipers<[log in to unmask]>