1. From the Institute of Radiology (M.S., A.S., M.K., J.H., F.B.L., A.M.N., M.U., T.B.) and Department of Neuroradiology (A.D.), University Hospital Erlangen, Maximiliansplatz 3, 91054 Erlangen, Germany; Department of Medical Biometry, Informatics and Epidemiology, University Hospital Bonn, Bonn, Germany (T.H.); and Institute of Medical Informatics, Biometry and Epidemiology, University of Erlangen, Erlangen, Germany (T.H.).