1. Department of Medical Oncology, IRCCS Fondazione Istituto Nazionale Tumori, Milano, Italy
2. Sarcoma Unit, Royal Marsden NHS Foundation Trust/ Institute of Cancer Research, Chelsea, London, United Kingdom
3. Unit of Clinical Epidemiology and Trial Organization, IRCCS Fondazione Istituto Nazionale Tumori, Milano, Italy
4. Department of Musculoskeletal Oncology, National Cancer Center Hospital, Tokyo, Japan
5. Department of Cancer Medicine, Gustave Roussy Cancer Campus, Villejuif, France
6. Center for Sarcoma and Bone Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
7. Department of Sarcoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
8. Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie Institute-Oncology Center, Warsaw, Poland
9. Department of Oncology, Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
10. Department of Medical Oncology, Centre Léon Bérard & Université Claude Bernard Lyon I, Lyon, France
11. Department of Cancer Medicine, Istituto Ortopedico Rizzoli, Bologna, Italy
12. Department of Medical Oncology, N.N. Blokhin Russian Cancer Research, Moscow, Russian Federation
13. Department of Medical Oncology, Università Campus Bio-Medico di Roma, Roma, Italy
14. Department of Clinical and Experimental Oncology, Medical Oncology 1 Unit, Istituto Oncologico Veneto IOV-IRCCS, Padova, Italy
15. Department of Medical Oncology, Radboud University Medical Center, Nijmegen, the Netherlands
16. Department of Medical Oncology, University Hospital Virgen del Rocio and LAB 215 IBIS, Sevilla, Spain
17. University of Milan, Department of Oncology and Hemato-oncology, Milan, Italy
18. Department of Medical Oncology, Leiden University Medical Center, Leiden, the Netherlands
19. Sarcoma Unit, Division of Medical Oncology Candiolo Cancer Institute, FPO, IRCCS Candiolo, Torino, Italy
20. Sarcoma Surgery, Fondazione IRCCS Istituto Nazionale Tumori, Milano, Italy
21. Department of Pathology, N.N. Blokhin Russian Cancer Research, Moscow, Russian Federation
22. Department of Diagnostic Pathology and Laboratory Medicine, IRCCS Fondazione Istituto Nazionale dei Tumori, Milan, Italy
23. Department of Pathology, Treviso Regional Hospital, Treviso, Italy
24. Department of Medicine, University of Padua, Padova, Italy
25. Department of Pathology, Radboud University Medical Centre, Nijmegen, the Netherlands
26. Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
27. Department of Pathology, Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
28. Department of Pathology, Gustave Roussy Cancer Campus, Villejuif, France
29. Department of Pathology, Istituto Ortopedico Rizzoli, Bologna, Italy
30. Department of Pathology, Centre Léon Bérard & Université Claude Bernard Lyon I, Lyon, France
31. Department of Pathology, Maria Sklodowska-Curie Institute-Oncology Center, Warsaw, Poland
32. Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston
33. Department of Pathology and Clinical Laboratories, National Cancer Center Hospital, Tokyo, Japan