1. Department of Radiology; Radboud University Medical Center; Nijmegen The Netherlands
2. Erwin L. Hahn Institute for Magnetic Resonance Imaging; University Duisburg-Essen; Essen Germany
3. Department of Diagnostic and Interventional Radiology and Neuroradiology; University Hospital Essen; Essen Germany
4. Siemens Healthcare; Erlangen Germany