1. From the Department of Neurology (M.A.P.), Mass General Brigham; Department of Medicine (A.S.L.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (R.E.S.), Wake Forest School of Medicine, Winston-Salem, NC; and Department of Neurology (R.M.E.S., C.E.G., D.G.L.), Johns Hopkins University School of Medicine, Baltimore, MD.