1. Department of Medical Oncology IRCCS Fondazione Istituto Nazionale Tumori Milan Italy
2. Department of Cancer Medicine Gustave Roussy Cancer Campus Villejuif France
3. Unit of Clinical Epidemiology and Trial Organization IRCCS Fondazione Istituto Nazionale Tumori Milan Italy
4. Center for Sarcoma and Bone Oncology Dana‐Farber Cancer Institute Boston Massachusetts
5. Department of Medical Oncology Centre Léon Bérard & Université Claude Bernard Lyon I Lyon France
6. Department of Musculoskeletal Oncology National Cancer Center Hospital Tokyo Japan
7. Department of Medicine University of Michigan Ann Arbor Michigan
8. Department of Medicine Sarcoma Medical Oncology Memorial Sloan Kettering Cancer Center and Weill Cornell Medical College New York New York
9. Department of Soft Tissue/Bone Sarcoma and Melanoma Maria Sklodowska‐Curie Institute‐Oncology Center Warsaw Poland
10. Department of Medical Oncology La Timone University Hospital Aix‐Marseille Université Marseille France
11. Department of Sarcoma Medical Oncology The University of Texas MD Anderson Cancer Center Houston Texas
12. Department of Medical Oncology Università Campus Bio‐Medico di Roma Rome Italy
13. Department of Medical Oncology Leiden University Medical Center Leiden Netherlands
14. Department of Specialized, Experimental and Diagnostic Medicine S. Orsola‐Malpighi Hospital University of Bologna Bologna Italy
15. Department of Medical Oncology Nuovo Ospedale “S. Stefano,” Prato Italy
16. Department of Medical Oncology Radboud University Medical Center Nijmegen the Netherlands
17. Department of Medical Oncology N. N. Blokhin Russian Cancer Research Moscow Russian Federation
18. Medical Oncology Northwell Cancer Institute and Cold Spring Harbor Laboratory Long Island New York
19. Sarcoma Unit Royal Marsden NHS Foundation Trust/Institute of Cancer Research London United Kingdom
20. Sarcoma Surgery Fondazione IRCCS Istituto Nazionale dei Tumori Milano Italy
21. Department of Pathology Gustave Roussy Cancer Campus Villejuif France
22. Department of Diagnostic Pathology and Laboratory Medicine IRCCS Fondazione Istituto Nazionale dei Tumori Milan Italy
23. Department of Pathology Treviso Regional Hospital Italy
24. Department of Pathology Brigham and Women's Hospital and Harvard Medical School Boston Massachusetts
25. Department of Biopathology Centre Léon Bérard Lyon France
26. Department of Oncology and Hemato‐oncology University of Milan Milan Italy