1. School of Physical and Occupational Therapy, McGill University and Center for Interdisciplinary Research in Rehabilitation, Jewish Rehabilitation Hospital, Montreal, Quebec, Canada,
2. McKnight Brain Institute, University of Florida, and Brain Rehabilitation Research Center, Malcom Randall VA Hospital, Gainesville, Florida
3. Departments of Rehabilitation Medicine, Medicine and Cell Biology, Emory University School of Medicine, and Atlanta VA Rehabilitation R&D Center, Atlanta, Georgia