1. From the Department of Neurology (M.v.B., G.M.D.M., H.S., U.F., M.R.H., S.J., B.G.S., H.P.M., M.A.) and Neuroradiology (J.G.), University Hospital of Bern, Bern¸ Switzerland; Department of Neurology, University Hospital Zurich, Zurich, Switzerland (H.S., R.W.B.); and Department of Neurology, Hôpital Lariboisière, APHP, Université Paris-Diderot, Paris, France (C.S., F.B., M.-G.B.).