1. Department of Rehabilitation Medicine, Icahn School of Medicine at Mount Sinai, New York, New York.
2. Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, New York.
3. Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital and Harvard Medical School, Boston, Massachusetts.
4. Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts.
5. Department of Rehabilitation Medicine, University of Washington, Seattle, Washington.
6. Department of Physical Medicine and Rehabilitation, University of Miami, Miami, Florida.
7. Research Service, Miami Veterans Administration Medical Center, Miami, Florida.
8. Department of General Internal Medicine, University of Washington, Seattle, Washington.
9. Department of Physical Medicine and Rehabilitation, Indiana University School of Medicine, Indianapolis, Indiana.
10. Rehabilitation Hospital of Indiana, Indianapolis, Indiana
11. Moss Rehabilitation Research Institute, Elkins Park, Pennsylvania.
12. Kessler Foundation Research Center, West Orange, New Jersey.
13. Craig Hospital, Englewood, Colorado.
14. Department of Physical Medicine and Rehabilitation, University of Alabama at Birmingham, Birmingham, Alabama.
15. Department of Communication Sciences and Disorders, Northeastern University, Boston, Massachusetts.