1. Department of Clinical Radiology, University Hospital M�nster, D‑48149 M�nster, Germany
2. Institute of Biostatistics and Clinical Research, University of M�nster, D‑48149 M�nster, Germany
3. Department of Diagnostic and Interventional Radiology, University Hospital Cologne, D‑50937 Cologne, Germany
4. Department of Medicine A ‑ Haematology and Oncology, University Hospital M�nster, D‑48149 M�nster, Germany
5. Department of Radiology, St. Franziskus‑Hospital M�nster, D‑48145 M�nster, Germany