1. Division of Surgical Oncology Department of Surgery Mannheim University Medical Center University of Heidelberg Mannheim Germany
2. Sarcoma Unit Interdisciplinary Tumor Center Mannheim University Medical Center University of Heidelberg Mannheim Germany
3. Department of Otorhinolaryngology, Head and Neck Surgery Heidelberg University Hospital Heidelberg Germany
4. Institute of Pathology Universitätsmedizin Mannheim Medical Faculty Mannheim Heidelberg University Mannheim Germany
5. Institute of Pathology Friedrich‐Alexander University Erlangen‐Nuremberg University Hospital Erlangen Erlangen Germany
6. sos‐Desmoid, e.V. SPAEN Sarcoma PAtients EuroNet e.V Wölfersheim Germany
7. Gerhard Domagk Institute of Pathology University Hospital Muenster Muenster Germany
8. Department of Surgery Universitätsmedizin Mannheim Medical Faculty Mannheim Heidelberg University Mannheim Germany