1. Clinic and Polyclinic for Internal Medicine I, University Hospital Carl Gustav Carus Technical University Dresden Dresden Germany
2. National Center for Tumor Diseases (NCT/UCC) Dresden Germany
3. Department of Internal Medicine C University Hospital Greifswald Greifswald Germany
4. Sarcoma Center Berlin‐Brandenburg Helios Hospital Bad Saarow Bad Saarow Germany
5. Division of Surgical Oncology & Thoracic Surgery, Mannheim University Medical Centre University of Heidelberg Mannheim Germany
6. Clinic for General, Visceral, and Pediatric Surgery University Hospital Goettingen Goettingen Germany
7. Interdisciplinary Tumour Centre, Sarcoma Unit University Medical Center Mannheim Mannheim Germany
8. Department of General Orthopedics and Tumor Orthopedics University Hospital Munster Muenster Germany
9. Institute of Medical Biostatistics, Epidemiology and Informatics University Hospital Mainz Mainz Germany
10. Department of Surgery University Hospital Erlangen Erlangen Germany
11. Hospital Frankfurt Hoechst Hoechst Germany
12. German Sarcoma Foundation Woelfersheim Germany
13. Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf University of Cologne Cologne Germany
14. Sarcoma Center Berlin‐Brandenburg Helios Hospital Berlin Buch Berlin Germany
15. Medical Clinic II University Hospital Frankfurt Frankfurt Germany
16. Vivantes Hospital Berlin Germany
17. Onkopraxis, Joint Practice for Hematology and Oncology Dresden Germany
18. Center for Evidence‐Based Healthcare, University Hospital Carl Gustav Carus Technical University Dresden Dresden Germany