J. Eric Ahlskog, M.D. is Professor of Neurology at the Mayo Medical School, and Chair of the Mayo Section of Movement Disorders, Mayo Clinic, Rochester, Minnesota. Widely considered to be a leading authority on this disorder, he has over twenty years of experience treating people with Parkinson's Disease, both in the clinic as a full-time, patient-seeing neurologist, and as a clinical-investigator, responsible for PD treatment protocols.