1. From the Institute of Neuroimmunology and Multiple Sclerosis (INIMS) (C.S., I.S., M.A.F.); Department of Neurology (C.S., I.S., S.C.F., M.A.F.), University Medical Center Hamburg-Eppendorf, Germany; and Pathology Department (J.-F.E.), Paris-Saclay University, Versailles SQY University (UVSQ), EA4340-BECCOH, Assistance Publique-Hôpitaux de Paris (APHP), Ambroise-Paré Hospital, Boulogne-Billancourt, France.