according to this new German study its 3 factors: a defective gene, failure to respond to a growth factor, and aging. doesn't help us much nor the mice in the study. all 3 factors are necessary. http://www.sciencedaily.com/releases/2010/04/100406172644.htm Ray Rayilyn Brown Past Director AZNPF Arizona Chapter National Parkinson Foundation ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn