1 Department of Neurology, hôpitaux universitaires de Strasbourg, Strasbourg, France. Electronic address: thomas.bogdan@chru-strasbourg.fr.
2 Department of Radiology, hôpitaux universitaires de Strasbourg, Strasbourg, France.
3 Department of Neurology, hôpitaux universitaires de Strasbourg, Strasbourg, France.
4 Department of Neurology, hôpitaux universitaires de Strasbourg, Strasbourg, France; Clinical Investigation Center, hôpitaux universitaires de Strasbourg, Strasbourg, France; Inserm U1119 Biopathology of myelin, Neuroprotection and Therapeutical Strategy, Strasbourg, France.