1. Department of Interventional and Diagnostic Radiology, Allgemeines Krankenhaus Hagen
2. Department of Medicine, Allgemeines Krankenhaus, Hagen
3. Department of Medicine, Sana Klinikum Duisburg
4. Department of Pathology of the Universityhospital Duesseldorf, Heinrich Heine Universität, Duesseldorf
5. Department of Diagnostic and Interventional Radiology and Nuclearmedicine, Marienhospital Herne
6. Department of Radiology, Universityhospital Wuerzburg