1 Department of Radiology and Nuclear Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands. Martin.vanAmerongen@radboudumc.nl.
2 Department of Neurology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands.
3 Department of Neurosurgery, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands.
4 Department of Radiology and Nuclear Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands.