1. Cleveland Clinic Foundation, Cleveland, OH, USA
2. Innovative Neurotronics, Austin, TX, USA
3. Kessler Foundation Research Center, West Orange, NJ, USA
4. Rutgers–New Jersey Medical School, Newark, NJ, USA
5. San Francisco VA Medical Center, San Francisco, CA, USA
6. VA North Texas Health Care System, TX, USA
7. UT Southwestern Medical Center, Dallas, TX, USA
8. Loma Linda University Medical Center, Loma Linda, CA, USA
9. Magee Rehabilitation Hospital, Philadelphia, PA, USA
10. Madonna Rehabilitation Hospital, Lincoln, NE, USA
11. Medical University of South Carolina, Charleston, SC, USA
12. Florida Hospital Neuroscience and Orthopedic Research Institute, Orlando, FL, USA
13. Halifax Health Center for Neurosciences, Daytona Beach, FL, USA
14. Helen Hayes Hospital, West Haverstraw, New York, NY, USA
15. South Shore Neurologic Associates, Patchogue, NY, USA
16. University of Minnesota Fairview, Minneapolis, MN
17. Rehabilitation Institute of Chicago, Chicago, IL, USA
18. Ralph H. Johnson VA Medical Center, Charleston, SC, USA
19. Oregon Health and Science University, Portland, OR, USA
20. University of Illinois at Chicago, Chicago, IL, USA
21. Marshfield Clinic Research Foundation, 1000 North Oak Avenue, Marshfield, WI, USA 54449
22. The Ohio State University Wexner Medical Center, Columbus, OH, USA
23. Marianjoy Rehabilitation Hospital, Wheaton, IL, USA
24. Hartford Hospital, Hartford, CT, USA
25. Guilford Neurologic Associates, Greensboro, NC, USA
26. SUNY Upstate Medical University, Syracuse, NY, USA
27. West Los Angeles VA Medical Center, Los Angeles, CA, USA