1. Univ Dusseldorf, Medical Faculty, Department of Diagnostic and Interventional Radiology, Dusseldorf;
2. Univ Duisburg-Essen, Medical Faculty, Department of Diagnostic and Interventional Radiology and Neuroradiology, Essen;
3. Univ Duisburg-Essen, Medical Faculty, Department of Gynecology and Obstetrics, Essen;
4. Univ Duisburg-Essen, Medical Faculty, Department of Nuclear Medicine, Essen;
5. Univ Duisburg-Essen, Institute of Pathology and Neuropathology, Essen, Germany