Vicky: you clarified my question further by stating "it is How....these cells are killed" And yes there could be a thousand ways. Which would explain the thousand different variations. I know I certainly feel like I have not lost my uniqueness in this shipload of dysfunctional persons.
Sidenote: The local PD association thought there were approx 7000 People with Pd in British Columbia, but were alarmed to find there were actually 11,000.+ and newly diagnosed stats are rising scary fast .... especiallly in the Y.O. group