1. Department of Surgery Fondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
2. Osteoncology, Bone and Soft Tissue Sarcomas, and Innovative Therapies Unit IRCCS Istituto Ortopedico Rizzoli Bologna Italy
3. Department of Surgery IRCCS Humanitas Research Hospital Rozzano Italy
4. Medical Oncology Department University Hospital Virgen del Rocio Seville Spain
5. Institute of Biomedicine of Seville University of Seville Seville Spain
6. Department of Cancer Medicine Hospital de la Santa Creu i Sant Pau Barcelona Spain
7. Department of Cancer Medicine Fondazione del Piemonte per l'Oncologia IRCCS Candiolo Turin Italy
8. Department of Oncology Medical Oncology 1 Unit Istituto Oncologico VenetoIRCCS Padua Italy
9. Department of Cancer Medicine Léon Bérard Cancer Center Lyon France
10. Université Claude Bernard Lyon I Lyon France
11. Department of Surgery Hospital Universitari Son Espases Palma de Mallorca Spain
12. Department of Cancer Medicine Hospital Universitari i Politècnic La Fe Valencia Spain
13. Department of Cancer Medicine Istituto Regina Elena Rome Italy
14. Department of Soft Tissue/Bone Sarcoma and Melanoma Centrum Onkologii Instytut im Marii Skłodowskiej Curie Warsaw Poland
15. Clinical Epidemiology and Trial Organization Fondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
16. Research and Statistics Infrastructure Azienda Unità Sanitaria Locale–IRCCS Reggio Emilia Italy
17. Clinical Trial Center and Department of Epidemiology IRCCS Azienda Ospedaliera Universitaria San MartinoIST Istituto Nazionale per la Ricerca sul Cancro Genoa Italy
18. Clinical Trial Center Italian Sarcoma Group Bologna Italy
19. Department of Orthopedic Oncology Istituto Ortopedico Rizzoli Bologna Italy
20. Department of Cancer Medicine Fondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
21. Department of Cancer Medicine Istituto Clinico Humanitas Rozzano Italy
22. Department of Radiology Fondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
23. Department of Pathology Hospital de la Santa Creu i Sant Pau Barcelona Spain
24. Department of Pathology Institut Bergonié Bordeaux France
25. Department of Pathology Treviso General Hospital Padua Italy
26. University of Padua Padua Italy
27. Laboratory of Oncologic Research Istituto Ortopedico Rizzoli Bologna Italy
28. Department of Oncology and Hemato‐Oncology University of Milan Milan Italy