List members: To those of you who replied about my father-in-law's rapidly declining mental state, thank you for your concern. Sad to say, it was not the PD, but a brain tumour, and the initial diagnosis of PD is now in doubt, according to the treating neurologist. Since the PD is now the least of our concerns, I will be unsubscribing to this list after this message, so forward any replies to me personally. _______________________________________________________________________________ George Tomlinson [log in to unmask] Department of Preventive Medicine and Biostatistics University of Toronto.