1. Faculty of Health Sciences and Medicine, University of Lucerne, Frohburgstrasse 3, 6002 Luzern, Switzerland
2. Sarcoma Center & Department of Orthopedics & Trauma, LUKS University Hospital, 6000 Lucerne, Switzerland
3. Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Zurich, 8032 Zurich, Switzerland
4. Klinik Hirslanden, St. Anna, 6000 Luzern, Switzerland
5. Sarkomzentrum KSW & Klinik für Orthopädie und Traumatologie, Kantonsspital Winterthur, 8400 Winterthur, Switzerland
6. Pathologie Enge, Pathology Institute, 8031 Zurich, Switzerland