Affiliation: | a Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Center, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany b Division of Neuroradiology, Department of Neurosurgery, University of Freiburg Medical Center, Breisacher Street 64, 79106 Freiburg, Germany c Department of Neurology, University of Heidelberg Medical Center, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany |