1. Department of Nutrition, Harvard T. H. Chan School of Public Health, Boston, MA, USA.
2. Partners Multiple Sclerosis Center, Brigham and Women’s Hospital, Boston, MA, USA.
3. Department of Neurology, Harvard Medical School, Boston, MA, USA.
4. Biostatistics Center, Massachusetts General Hospital, Boston, MA, USA.
5. Neurologic Clinic and Policlinic, MS Center and Research Center for Clinical Neuroimmunology and Neuroscience Basel (RC2NB), University Hospital Basel, University of Basel, Basel, Switzerland.
6. Division of Genetics, Brigham and Women’s Hospital, Howard Hughes Medical Institute, Department of Genetics, and Program in Virology, Harvard Medical School, Boston, MA, USA.
7. Center for Communicable Disease Dynamics, Department of Epidemiology, and Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA, USA.
8. Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA.
9. Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
10. Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA.
11. Channing Laboratory, Department of Medicine, Brigham and Women’s Hospital, and Harvard Medical School, Boston, MA, USA.