1. From the Department of Neurology (J.M., E.B.R., M.S.), University of Münster, Albert-Schweitzer-Straße 33, 48149 Münster, Germany; the Institute of Epidemiology and Social Medicine (H.W., J.W., K.B.), University of Münster, Münster, Germany; and the Department of Neurology (W.-R.S.), EVK Bielefeld, Bielefeld, Germany.