Hans, et al. Fascinating and informative discussion. You've sure got me thinking, Hans (not that I stopped ---- yet). I feel like a new doorway to further learning about PD snd has been opened for me, and I appreciate the stimulus of taking a peek into the world of medicine and medical research. Thanks for your time and effort in helping to keep our gray matter in the pink! Barb Mallut [log in to unmask] ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn