[1] Harvard TH Chan Sch Publ Hlth, Dept Nutr, Boston, MA 02115 USA
[2] Brigham & Womens Hosp, Partners Multiple Sclerosis Ctr, 75 Francis St, Boston, MA 02115 USA
[3] Harvard Med Sch, Dept Neurol, Boston, MA 02115 USA
[4] Massachusetts Gen Hosp, Biostat Ctr, Boston, MA USA
[5] Univ Basel, Univ Hosp Basel, Neurol Clin & Policlin, MS Ctr, Basel, Switzerland
[6] Univ Basel, Univ Hosp Basel, Res Ctr Clin Neuroimmunol & Neurosci Basel RC2NB, Basel, Switzerland
[7] Harvard Med Sch, Brigham & Womens Hosp, Howard Hughes Med Inst, Div Genet,Dept Genet, Boston, MA 02115 USA
[8] Harvard Med Sch, Program Virol, Boston, MA 02115 USA
[9] Harvard TH Chan Sch Publ Hlth, Ctr Communicable Dis Dynam, Dept Epidemiol, Boston, MA USA
[10] Harvard TH Chan Sch Publ Hlth, Dept Immunol & Infect Dis, Boston, MA USA
[11] Harvard Med Sch, Brigham & Womens Hosp, Dept Pathol, Boston, MA 02115 USA
[12] Uniformed Serv Univ Hlth Sci, Dept Prevent Med & Biostat, Bethesda, MD 20814 USA
[13] Harvard TH Chan Sch Publ Hlth, Dept Epidemiol, Boston, MA 02115 USA
[14] Harvard Med Sch, Brigham & Womens Hosp, Dept Med, Channing Lab, Boston, MA 02115 USA