1. From the Department of Neurology (J.M., E.B.R., M.S.), University of Münster, Münster, Germany; Institute of Epidemiology and Social Medicine (H.W.), University of Münster, Münster, Germany; Department of Clinical Radiology (W.H., T.N., A.K.), University of Münster, Münster, Germany; EVK Bielefeld (W.R.S.), Neurologische Klinik, Bielefeld, Germany.