1. Department of Orthopedics and Trauma Surgery, Faculty of Medicine, Medical Center – University of Freiburg, Freiburg, Germany;
2. Comprehensive Cancer Center Freiburg (CCCF), Faculty of Medicine, Medical Center – University of Freiburg, Freiburg, Germany;
3. Clinical Trials Unit, Medical Clinic, Faculty of Medicine, Medical Center – University of Freiburg, Freiburg, Germany;
4. Department of Medicine, Hematology and Oncology, Faculty of Medicine, Medical Center – University of Freiburg, Freiburg, Germany;
5. Department of Orthopaedics and Traumatology, Odense University Hospital, Odense, Denmark;
6. Department of Clinical Research, University of Southern Denmark, Odense, Denmark