1. Department of Neuroradiology University Medical Center Hamburg‐Eppendorf Hamburg Germany
2. Department of Neuroradiology Westpfalz‐Klinikum KaiserslauternGermany
3. Faculty of Medicine Mannheim University of Heidelberg HeidelbergGermany
4. Department of Medical Biometry and Epidemiology University Medical Center Hamburg‐Eppendorf HamburgGermany
5. Department of Neurology University Medical Center Hamburg‐Eppendorf Hamburg Germany