First of all, let me thank all the people who answered me, either on the list or by direct e-mail. I apreciate warmly. Here are a few points on which I'd like to have some precisions : MELATONIN : In me message, I mentioned my father had a go at melatonin. He did that after he had read a book from Dr PIERPAOLI, who related he had given melatonin to his grandmother, affected with PD. He said she was CURED. Just so. Now my question : has any of you ever taken melatonin, and to what result ? Are there any studies on the subject ? As I said earlier, it helped my father for some time, and he would like to know more about it. DEPRENYL : why is it sometimes described as dangerous, and to what extent ? I'd like to contact groups in France, but my father already did. My father has this charming Attila side : after he passes somewhere, everything is burned down : I'm afraid these people won't talk to him anymore, and anyway my father wouldn't hear anything from them, even if they said it snows on mountains in winter. Speaking of melatonin : what is the current status of that drug in the usa ? In France, it is forbidden. Thanks again to everyone. Olivier SIX.