1. From the Institute of Rehabilitation Medicine, N.Y. University Medical Center, 400 East 34th St., New York, NY 10016, where reprint requests should be addressed to Dr. Askanas, the Medical Neurology Branch, National Institute of Neurological and Communicative Disorders and Stroke, National Institutes of Health, Bethesda, MD, and the H. Houston Merritt Clinical Research Center for Muscular Dystrophy and Related Diseases, and the Department of Neurology, Neurological Institute, Columbia–Presbyterian...