1Department of Neuroradiology, University Hospital Heidelberg, Heidelberg, Germany, 2Division Medical and Biological Informatics, DKFZ - German Cancer Research Center, Heidelberg, Germany, 3Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States, 4Department of Neurology, University of Heidelberg Medical Center, Heidelberg, Germany, 5Department of Neuroradiology, University of Heidelberg Medical Center, Heidelberg, Germany, 6Department of Biostatistics and Epidemiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States, 7Department of Radiology, DKFZ - German Cancer Research Center, Heidelberg, Germany