1. Department of Orthopaedics and Trauma Surgery, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
2. Department of Orthopaedics, Etablissements Hospitaliers du Nord Vaudois, Yverdon-les-Bains, Switzerland
3. Department of Orthopaedics, Schulthess Klinik, Zürich, Switzerland and Lausanne Sarcoma Center, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
4. Department of Orthopaedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
5. Institute of Pathology, Lausanne Sarcoma Center, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
6. Department of Orthopaedics and Trauma Surgery, Lausanne Sarcoma Center, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland