1. From the Departments of Neurology and Clinical Neurophysiology (A.H., C.S., P.D., A.N., C.W.), Diagnostic Radiology, Medical Physics (A.F., J.B., A.F.S., J.H., M.M.), Cardiology and Angiology (A.L.S.), and the Institute of Medical Biometrics and Statistics (M.O.), University of Freiburg, Germany.