Parkinson's Disease Early Detection Survey We invite you to take part in a research survey being conducted by the Movement Disorders Center at Glenbrook Hospital, Glenview, Illinois. Dr. Michael Rezak and his research associates are obtaining data through a detailed questionnaire regarding potential early indicators in the development of Parkinson's disease. You must have an existing diagnosis of Parkinson's disease. This survey will be mailed to you and involve approximately 1-1½ hours of your time. Early discovery of genetic and environmental factors causing Parkinson's disease is critical for early diagnosis, effective intervention and the arrest of Parkinson's symptoms. For more information about this research study, please contact Sandy Vergenz, R.N., B.S.N. or Paula Parks, B.S. at (847) 657-5672.