David: Sorry, I'm not going to exactly answer your question. I must comment on your embarrassment in asking your doctor your questions. You mustn't be embarrassed to ask him anything and everything. It's not your fault you have PD and you didn't do anything wrong to get it. Rather than being embarrassed, be forceful about seeking answers and treatment. If you think you learned something new, discuss it with your Dr. Unless he is a movement disorder specialist, you could end up more up to date than him as a result of staying current with this and other PD lists. Ask away. Shout the questions if you have to. THERE IS NOTHING TO BE ASHAMED OF Paul H. Lauer