1. Department of Radiation Oncology, Cyberknife and Radiotherapy; Faculty of Medicine and University Hospital Cologne; Cologne Germany
2. Cochrane Cancer, Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Düsseldorf; Faculty of Medicine and University Hospital Cologne, University of Cologne; Cologne Germany
3. Internal Medicine I; University of Cologne, Faculty of Medicine and University Hospital Cologne; Cologne Germany
4. Internal Medicine III - Hematology/Oncology; University Hospital Munich; Munich Germany