1. Department of Diagnostic and Interventional Neuroradiology University Medical Center Hamburg‐Eppendorf Hamburg Germany
2. Department of Radiology Stanford University Stanford CA USA
3. Institute of Medical Biometry and Epidemiology University Medical Center Hamburg‐Eppendorf Hamburg Germany
4. Department of Neuroradiology University Hospital Basel Basel Switzerland
5. Department of Neurology University Medical Center Hamburg‐Eppendorf Hamburg Germany
6. Division of Neuroradiology Harvard Medical School and Massachusetts General Hospital Boston MA USA
7. Department of Neuroradiology Westpfalz‐Klinikum Kaiserslautern Germany
8. Department of Neuroradiology University of Schleswig‐Holstein Luebeck Germany