1. University Hospital of Cologne; Cochrane Haematological Malignancies Group, Department I of Internal Medicine; Kerpener Str. 62 Cologne Germany
2. German Sport University Cologne; Institute of Cardiovascular Research and Sport Medicine; Cologne Germany
3. University Hospital of Cologne; Department I of Internal Medicine, Center of Integrated Oncology Köln Bonn; Kerpener Str. 62 Cologne Germany 50924
4. University of Cologne, Faculty of Medicine and University Hospital Cologne; Cochrane Cancer, Department I of Internal Medicine; Kerpener Str. 62 Cologne Germany 50937