1. Department of Neurology, Boston University School of Medicine and VA Boston Healthcare System
2. VA Boston Healthcare System and Department of Epidemiology, Boston University School of Public Health
3. Department of Speech-Language-Hearing Sciences, Lehman College, the City University of New York
4. Program in Speech and Hearing Sciences, the Graduate Center of the City University of New York
5. Program in Occupational Therapy and Department of Radiology, Washington University School of Medicine, St. Louis