1. Department of Physical Therapy, The University of Alabama at Birmingham, Birmingham, AL, USA
2. Department of Epidemiology and Department of Neurology, Johns Hopkins University, Baltimore, MD, USA
3. Department of Rehabilitation Medicine, University of Washington, Seattle, WA, USA
4. National Multiple Sclerosis Society, New York, NY, USA
5. Department of Neurology, Oregon Health & Science University, Portland, OR, USA
6. Exercise Science Program, Physical Therapy Department, Marquette University, Milwaukee, WI, USA
7. Mellen Center for MS, Cleveland Clinic Foundation, Cleveland, OH, USA
8. Department of Neurology, University of California, Los Angeles, Los Angeles, CA, USA
9. Department of Kinesiology, University of Georgia, Athens, GA, USA
10. College of Applied Health Sciences, University of Illinois at Chicago, Chicago, IL, USA
11. Early Childhood, Special Education, and Rehabilitation Counseling, University of Kentucky, Lexington, KY, USA
12. Frances Payne Bolton School of Nursing, Case Western Reserve University, Cleveland, OH, USA
13. Icahn School of Medicine at Mount Sinai and Advanced Research Science Center, City University at New York, New York, NY, USA
14. Kessler Foundation, East Hanover, NJ, USA