1. Division of Epidemiology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
2. Department of Clinical Neuroscience and Center for Molecular Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
3. Computational Biology Graduate Group, University of California, Berkeley, Berkeley, CA, USA
4. Department of Neurology, University of California, San Francisco, San Francisco, CA, USA
5. Partners Pediatric Multiple Sclerosis Center, Massachusetts General Hospital for Children, Boston, MA, USA
6. Division of Neurology, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
7. Blue Bird Circle Multiple Sclerosis Center, Baylor College of Medicine, Houston, TX, USA
8. Children’s Hospital Colorado, University of Colorado, Denver, CO, USA
9. The Lourie Center for Pediatric MS, Stony Brook Children’s Hospital, Stony Brook, NY, USA
10. Department of Neurology & Neurotherapeutics, University of Texas Southwestern, Dallas, TX, USA
11. Pediatric Multiple Sclerosis Center, Jacobs Neurological Institute, SUNY Buffalo, Buffalo, NY, USA
12. Pediatric MS Center, Loma Linda University Children’s Hospital, Loma Linda, CA, USA
13. Pediatric MS Center, Mayo Clinic, Rochester, MN, USA
14. Department of Neurology and Regional Pediatric MS Center, University of California, San Francisco, San Francisco, CA, USA
15. Center for Pediatric Onset Demyelinating Disease, University of Alabama and Children’s Hospital of Alabama, Birmingham, AL, USA
16. Division of Neurology, Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
17. University of Utah and Primary Children’s Hospital, Salt Lake City, UT, USA
18. Boston Children’s Hospital, Boston, MA, USA
19. Pediatric–onset Demyelinating Diseases and Autoimmune Encephalitis Center, St. Louis Children’s Hospital, Washington University School of Medicine, St. Louis, MO, USA
20. Children’s National Medical Center, Washington, DC, USA
21. Department of Neurology, University of Utah School of Medicine, Salt Lake City, UT, USA
22. Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA
23. Division of Research, Kaiser Permanente, Oakland, CA, USA
24. Institute of Environmental Medicine (IMM), Karolinska Institutet, Stockholm, Sweden
25. Institute of Environmental Medicine (IMM), Karolinska Institutet, Stockholm, Sweden/Centre for Occupational and Environmental Medicine, Stockholm County Council, Stockholm, Sweden
26. Division of Research, Kaiser Permanente, Oakland, CA, USA/Research Program on Genes, Environment and Health, Kaiser Permanente, Oakland, CA
27. Division of Epidemiology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA/Computational Biology Graduate Group, University of California, Berkeley, Berkeley, CA, USA; Division of Research, Kaiser Permanente, Oakland, CA, USA