From the Department of Pediatrics (T.C.), McMaster Children's Hospital, McMaster University, Hamilton, Ontario, Canada; Department of Pediatrics (H.V.M.), Duke University, Durham, NC; Neuroimmunology Program (F.G., J.D.), Institut d'Investigacions Biomèdiques August Pi I Sunyer, Barcelona, Spain; Department of Pediatrics (E.M.), Baylor College of Medicine, Houston, TX; Department of Neurology (W.G., K.V.H.), Lucile Packard Children's Hospital, Stanford University, Palo Alto, CA; Division of... (At 2020-03)