Mary Yost asked about Prof. Fischbach: > ... His work may not be directly related to PD. But one of his > recent papers concerned "Neurotrophic factors". "PARKINSON'S DISEASE QUESTIONS AND ANSWERS", the new book mentioned here by Robert A Hauser and Theresa A Zesiewicz, contains a brief discussion. Neurotropic factors are very much related to PD. They are "capable of of increasing neuronal survival, protecting neurons against injury, and promoting the sprouting of dopaminergic axons...." They are being investigated for possible use in preventing or slowing dopamine neuron degeneration. Phil Tompkins Hoboken NJ 60/9