1. Department of Orthopedic Oncology, Sarcoma Center, Helios Klinikum Berlin-Buch, 13125 Berlin, Germany
2. Center for Orthopedics, Trauma Surgery and Rehabilitation Medicine, University Medicine Greifswald, Ferdinand-Sauerbruch-Straße, 17475 Greifswald, Germany
3. Department of Orthopedics and Sports Orthopedics, Klinikum Rechts der Isar, Technical University of Munich, 81675 Munich, Germany
4. Department of Orthopedics and Trauma, Medical University of Graz, 8036 Graz, Austria
5. Department of Oncology, Sarcoma Center, Helios Klinikum Berlin-Buch, 13125 Berlin, Germany
6. Department of Hematology, Oncology and Palliative Medicine, Vivantes Klinikum Berlin Neukölln, Rudower Straße 48, 12351 Berlin, Germany
7. Division of Clinical Oncology, Department of Internal Medicine, Medical University of Graz, 8036 Graz, Austria
8. Department of Oncology, Sarcoma Center Berlin-Brandenburg, Helios Klinikum, 15526 Bad Saarow, Germany
9. Department of General Orthopedics and Tumor Orthopedics, Münster University Hospital, 48149 Münster, Germany