1 From the Department of Neurology (J.F.S.), Icahn School of Medicine at Mount Sinai, New York, NY; Multiple Sclerosis Clinic (G.V.M.), Belfast City Hospital, N Ireland, UK; and Department of Neurology (D.B.), Oregon Health & Science University, Portland. james.sumowski@mssm.edu.
2 From the Department of Neurology (J.F.S.), Icahn School of Medicine at Mount Sinai, New York, NY; Multiple Sclerosis Clinic (G.V.M.), Belfast City Hospital, N Ireland, UK; and Department of Neurology (D.B.), Oregon Health & Science University, Portland.