1. Clinic and Polyclinic for Internal Medicine I University Hospital Carl Gustav Carus Technical University Dresden Dresden Germany
2. Sarcoma Center National Center for Tumor Diseases (NCT/UCC) University Hospital Carl Gustav Carus Technical University Dresden Dresden Germany
3. Institute of Medical Biostatistics, Epidemiology and Informatics University Medical Centre of Johannes Gutenberg University Mainz Mainz Germany
4. Division of Surgical Oncology & Thoracic Surgery Mannheim University Medical Center University of Heidelberg Heidelberg Germany
5. Sarcoma Unit Mannheim Cancer Center Mannheim University Medical Center University of Heidelberg Mannheim Germany
6. Department of General Orthopedics and Tumor Orthopedics University Hospital Münster Münster Germany
7. Sarcoma Center Berlin‐Brandenburg Helios Hospital Bad Saarow Bad Saarow Germany
8. Department of Internal Medicine C University Hospital Greifswald Greifswald Germany
9. Clinic for General, Visceral, and Pediatric Surgery University Hospital Goettingen Goettingen Germany
10. German Sarcoma Foundation Woelfersheim Germany
11. Department of Visceral, Thoracic and Vascular Surgery University Hospital Carl Gustav Carus Technical University Dresden Dresden Germany
12. Center for Evidence‐based Healthcare University Hospital Carl Gustav Carus Technical University Dresden Dresden Germany