Dear Networkers; Congratulations to Bill Johnson for a very interesting paper. I read it over the weekend and found it to be informative, and some beyond my knowledge of the physiology and biochemistry. I hope that those of you who have read it will comment on it. One question: In Part 5, on Current Therapy, Bill says: If the free radical hypothesis of neuronal degeneration is correct, the administration of L-dopa (which can be metabolized to form free radicals) could increase the rate of progression of Parkinson's disease. What is the currt evidence about the free radical hypothesis? And the current level of belief in the field? Is there evidence that the rate is accelerated? It makes me feel a bit like Dorian Gray, with Sinemet and Eldepryl giving me a substantial relief from the symptoms, BUT with a later price to be paid. Anyway, I'd be interested in hearing others about this. Again, Bill Johnson, a very well done job. Bob Newbrough