I just read Charles O'Hara's thoughtful message about smoking and had to respond. There seem to be a number of smokers on the list who also have PD, so obviously it's not a guaranteed solution!!! I am working on trying to encourage a friend in his rather tenative decision to stop smoking by his birthday, which is Dec. 1, and certainly any possible mild protection against PD that he might lose is far outweighed by reducing his chances of lung cancer, stroke, heart disease, and all the other diseases associated with smoking. I hope there will be a lot of research done on this connection but that it won't encourage anyone to start smoking or delay a decision to quit. Mary Vass, who has lots of other vices and achieves empathy with her smoking friends by trying to imagine giving up chocolate :-)