1. William C. Baird Multiple Sclerosis Research Center, The Jacobs Neurological Institute, Buffalo, NY 14203, USA,
2. William C. Baird Multiple Sclerosis Research Center, The Jacobs Neurological Institute, Buffalo, NY 14203, USA, Deceased
3. William C. Baird Multiple Sclerosis Research Center, The Jacobs Neurological Institute, Buffalo, NY 14203, USA
4. Center for Research Methodology and Biometrics, AMC Cancer Research Center, Lakewood, CO 80214, USA
5. Department of Neurology and Neuroscience, Cornell Medical Center, New York, NY 10021, USA
6. Multiple Sclerosis Care Center, North Shore University Hospital at East Meadow, East Meadow, NY 11554, USA
7. Department of Neurology, State University of New York at Stony Brook University Hospital, Stony Brook, NY 11794, USA
8. Kingston Neurological Associates, Kingston, NY 12401, USA
9. Department of Neurology, University of Rochester Medical Center, Rochester, NY 14642, USA
10. Division of Neurology, Winthrop-University Hospital, Mineola, NY 11501, USA
11. The Hospital for Joint Diseases/Orthopedic Institute, MS Care Center, New York, NY 10003, USA
12. Neurological Associates of Albany, Albany, NY 12208, USA
13. Department of Neurology, Albany Medical College, Albany, NY 12208, USA
14. Glens Falls Neurology, Glens Falls, NY 12801, USA
15. Catskill Neuroscience and Radiology Associates, Oneonta, NY 13820, USA
16. Department of Neurology, SUNY Upstate Medical University, Syracuse, NY 13210, USA
17. Division of Neurology, Maimonides Medical Center, Brooklyn, NY 11219, USA
18. Staten Island University Hospital, Staten Island, NY 10306, USA
19. New York Hospital Medical Center of Queens, Flushing, NY 11355, USA
20. Uniform Data System for Medical Rehabilitation, State University of New York at Buffalo