1. University Medical Center Hamburg-Eppendorf, Hamburg, Germany
2. Medical Clinic and Policlinic 1, University Hospital “Carl Gustav Carus” Dresden, Dresden, Germany
3. University Hospital Tübingen, Tübingen, Germany
4. Department of Internal Medicine V, Heidelberg University Hospital, Heidelberg, Germany
5. NCT-Trial Center, National Center of Tumor Diseases Heidelberg, German Cancer Research Center, Heidelberg, Germany
6. Internal Medicine V, Medical University of Innsbruck, Innsbruck, Austria
7. Tyrolean Cancer Research Institute, Innsbruck, Austria
8. Medical Clinic III, University Clinic Bonn, Bonn, Germany
9. Hannover Medical School, Hannover, Germany
10. University Hospital Düsseldorf, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
11. University Medical Center Göttingen, Göttingen, Germany
12. Department of Medicine 2, University Hospital, Goethe University Frankfurt, Frankfurt am Main, Germany
13. Department of Medicine 5, Paracelsus Private University Nuremberg, Nuremberg, Germany
14. Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn, University of Cologne, Cologne Düsseldorf, Germany
15. Department of Hematology and Oncology, University Hospital Mannheim, Mannheim, Germany
16. University Hospital Ulm, Ulm, Germany
17. University Medical Center Münster, Münster, Germany
18. University Medical Center Essen, Essen, Germany
19. Staburo München, Statistical Consulting, Munich, Germany
20. St Mary's Hospital, Düsseldorf, Germany
21. University of Leipzig Medical Center, Leipzig, Germany