1. From the University of Erlangen, Radiological Institute, Maximiliansplatz 3, 91054 Erlangen, Germany (C.T., M.W., M.S.M., R.H., M.U., W.W.); Department of Medical Biometry, Informatics and Epidemiology, Faculty of Medicine, University of Bonn, Bonn, Germany (T.H.); and Institute of Medical Informatics, Biometry and Epidemiology, University of Erlangen-Nuremberg, Erlangen, Germany (T.H.).