1. Department of Neurology, UTSA, San Antonio, TX, USA
2. Department of Neurology, Loma Linda University, Loma Linda, CA, USA
3. Department of Neurology, Medical College of Wisconsin, Milwaukee, WI, USA
4. Department of Neurology, Medical College of Georgia, Augusta, GA, USA
5. Neurosciences Clinical Trials Unit, UNC Chapel Hill, NC, USA
6. Department of Neurology, University of Miami, Miami, FL, USA
7. Neurology Department, University of Tennessee Health Science Center, Memphis, TN, USA
8. Department of Neurology, Barrow Neurological Institute, Phoenix, AZ, USA
9. Department of Neurology, University of Utah, Salt Lake City, UT, USA
10. ALS Department, Hospital Carlos III-La Paz, Madrid, Spain
11. Department of Rehabilitation, Elson S. Floyd College of Medicine, Washington State University, Spokane, WA, USA
12. Department of Neurology, University of Kansas, Kansas City, KS, USA
13. Origent Data Sciences, Inc, Vienna, VA, USA
14. Department of Neurology, University of Michigan, Ann Arbor, MI, USA
15. Department of Neurology, Temple Health, Philadelphia, PA, USA
16. University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
17. Green Hope High School, Cary, NC, USA
18. Department of Neuroscience, University of Sheffield, Sheffield, UK
19. Department of Neurology, University of Nebraska Medical Center, Omaha, NE, USA
20. Tulane University, New Orleans, LA, USA
21. Independent Consultant, Lichfield, UK, and
22. Department of Neurology, Duke University, Durham, NC, USA