1. Department of Diagnostic and Interventional Radiology, Dusseldorf University School of Medicine, Dusseldorf, Germany; Department of Diagnostic and Interventional Radiology and Neuroradiology, Duisburg-Essen University School of Medicine, Essen, Germany

2. Department of Nuclear Medicine, Duisburg-Essen University School of Medicine, Essen, Germany

3. Department of Diagnostic and Interventional Radiology, Dusseldorf University School of Medicine, Dusseldorf, Germany.

4. Departments of Diagnostic and Interventional Radiology and Neuroradiology, Duisburg-Essen University School of Medicine, Essen, Germany.

5. Departments of Diagnostic and Interventional Radiology, Dusseldorf University School of Medicine, Dusseldorf, Germany.