1. Department of Neurology, Eleanor and Lou Gehrig ALS CenterColumbia University Irvine Medical Center New York New York
2. Department of BiostatisticsMailman School of Medicine, Columbia University New York New York
3. Department of NeurologyPennsylvania State University Hershey Pennsylvania
4. Sean M. Healey & AMG Center for ALS, Department of NeurologyMassachusetts General Hospital Boston Massachusetts
5. Department of Physical Medicine and RehabilitationSpaulding Rehabilitation Hospital, Harvard Medical School Boston Massachusetts
6. Department of NeurologyThe Ohio State University Columbus Ohio
7. Department of NeurologyUniversity of Toronto, Sunnybrook Hospital Toronto Ontario Canada
8. Department of NeurologyUniversity of Kansas Kansas City Kansas
9. Department of NeurologyMayo Clinic, Minnesota Rochester Minnesota
10. Clinical Unit, National Institute of Neurological Diseases and Stroke Bethesda Maryland
11. Department of NeurologyCleveland Clinic Cleveland Ohio
12. Department of NeurologyUniversity of Nebraska Omaha Nebraska
13. Texas Neurology Dallas Texas
14. Department of NeurologyEmory University and Atlanta VA Medical Center Atlanta Georgia
15. Department of NeurologyMayo Clinic Jacksonville Jacksonville Florida
16. Department of NeurologyTemple University Philadelphia Pennsylvania
17. Department of NeurologyJohns Hopkins University Baltimore Maryland
18. Department of Neurology University of California Davis Davis California
19. Department of NeurologySt Louis University St Louis Missouri
20. Department of NeurologyUniversity of Texas Southwestern Dallas Texas
21. Department of NeurologyMount Sinai/Beth Israel Hospital New York New York
22. Department of NeurologyUniversity of Minnesota Minneapolis Minnesota
23. Department of NeurologyUniversity of Pennsylvania Philadelphia Pennsylvania