1. Department of Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
2. Department of Radiology and Nuclear Medicine, University Hospital of Schleswig-Holstein, Lübeck, Germany
3. Institute for Diagnostic and Interventional Radiology, Pediatric and Neuroradiology, Rostock University Medical Center, Rostock, Germany
4. Section of Pediatric Radiology, Institute of Diagnostic and Interventional Radiology, University Hospital Jena, Germany
5. Department for Diagnostic and Interventional Radiology, University Hospital Aachen, Germany
6. Medical Faculty, University of Leipzig, Germany
7. Institute of Diagnostic and Interventional Radiology, University Hospital Zürich, Switzerland