1. Department of Radiology, Massachusetts General Hospital Athinoula A. Martinos Center for Biomedical Imaging, , Charlestown, MA 02129 , United States
2. Harvard Medical School , Boston, MA 02115 , United States
3. Brigham and Women's Hospital Partners Multiple Sclerosis Center, , Boston, MA 02115 , United States
4. Harvard Medical School Department of Neurology, , Boston, MA 02115 , United States
5. Massachusetts General Hospital Biostatistics Center, , Boston, MA 02114 , United States
6. Spaulding Rehabilitation Hospital, The Teaching Affiliate of Harvard Medical School Stroke Biological Recovery Laboratory, , Charlestown, MA 02129 , United States
7. MGH Institute of Health Professions, Boston Department of Communication Sciences and Disorders, , MA 02129 , United States
8. MGH Institute of Health Professions Department of Physical Therapy, School of Health and Rehabilitation Sciences, , Boston, MA 02129 , United States