1. Department of Internal Medicine V; University Clinic Heidelberg; Heidelberg Germany
2. Division of Biostatistics; German Cancer Research Centre (DKFZ); Heidelberg Germany
3. Nationales Centrum für Tumorerkrankungen (NCT) Heidelberg; Heidelberg Germany
4. Medical Clinic and Polyclinic III; University Hospital Bonn; Bonn Germany
5. Department of Internal Medicine III; Klinikum Chemnitz; Chemnitz Germany
6. Department of Internal Medicine II; University Clinic Würzburg; Würzburg Germany
7. Department of Medicine I; University Hospital Dresden Carl Gustav Carus; Dresden Germany
8. Department of Haematology and Oncology; Klinikum Baden Baden; Baden Baden Germany
9. Department of Haematology and Oncology; University Clinic Gießen/Marburg; Marburg Germany
10. Department of Internal Medicine I; Klinikum Bremen Mitte; Bremen Germany
11. Department of Haematology and Oncology; Evangelische Kliniken Bonn; Bonn Germany
12. Department of Internal Medicine II; Carl-Thiem Klinikum Cottbus; Cottbus Germany
13. Department of Internal Medicine I; University Hospital Köln; Köln Germany