Stephan - I am sure many of us not only welcome you to the list, but also hope you will share with us your findings on "new aspects of the etiology of PD". There has been much speculation about this, and discussions about theories on the list. It is an issue that concerns those of us who have family members or close friends with PD, as well as those with PD. Good luck with your future plans. Barb Colmery, RN, BSN [log in to unmask]