Becky, I always have felt that many of us have that (whatever it is) causes PD, and something either triggers it or our bodies can't fight this thing, therefore PD or cancer, or something shows up. In other words, we may all be predisposed to a lot of diseases, but some can fight it others can't. It's my understanding, that this a logical observation many doctors agree upon. Who knows? I hope someone and soon. Gerry([log in to unmask]) 59/12