1. Washington University School of Medicine in St Louis, St Louis, Missouri
2. Cleveland Clinic, Cleveland, Ohio
3. Johns Hopkins University School of Medicine, Baltimore, Maryland
4. Consortium of MS Centers, Hackensack, New Jersey
5. The University of British Columbia, Vancouver, British Columbia, Canada
6. MS Society of Canada, Toronto, Ontario, Canada
7. National Multiple Sclerosis Society, Chicago, Illinois
8. University of Miami School of Medicine, Miami, Florida
9. The University of Alabama at Birmingham, Birmingham