1. Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
2. Department of Diagnostic and Interventional Radiology, University Hospital Tuebingen, Tuebingen, Germany
3. Department of Nuclear Medicine, University Medical Center Rostock, Rostock, Germany
4. Department of Diagnostic and Interventional Radiology, University Duesseldorf, Medical Faculty, Duesseldorf, Germany
5. Department of Nuclear Medicine, Faculty of Medicine and University Hospital Carl Gustav Carus, TU Dresden, Germany
6. Institute of Diagnostic and Interventional Radiology, University Hospital of Cologne, Cologne, Germany
7. Department of Nuclear Medicine, Technical University of Munich, Munich, Germany
8. Institute of Diagnostic and Interventional Radiology, Pediatric Radiology and Neuroradiology, University Medical Center Rostock, Rostock, Germany
9. Department of Nuclear Medicine, Heidelberg University Hospital, Heidelberg, Germany
10. Department of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
11. Department of Nuclear Medicine, University Hospital Essen, Essen, Germany
12. Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany