Ida--your point is well taken. I've wondered how it might be possible to study why certain people get Type A -PD, and others get Type B-PD, for example---with tremor or without, etc. Anything like this would be a MAJOR undertaking if it were to have statistical significAnce. MAYBE it is better in the long run to hunt for a cure--but how can that be unrelated to understanding the disease??? I'm dizzy! Camilla Flintermann, CG for Peter, 79/8, Oxford,Ohio [log in to unmask] * * * * * * * * * * * * * * "Ask me about the CARE list for PD caregivers!" * * * * * * * * * * * * * *