[1] Fdn IRCCS Ist Nazl Tumori, Dept Surg, Milan, Italy
[2] Univ Milan, Milan, Italy
[3] Royal Marsden Hosp, Dept Oncol, London, England
[4] Inst Canc Res, London, England
[5] Azienda Osped Univ Padova, Dept Pathol, Padua, Italy
[6] EPE, Inst Portugues Oncol Lisboa Francisco Gentil, Lisbon, Portugal
[7] Homi Bhabha Natl Inst, Tata Mem Ctr, Dept Med Oncol, Mumbai, Maharashtra, India
[8] Univ Duisburg Essen, Interdisciplinary Sarcoma Ctr, West German Canc Ctr, Dept Med Oncol, Essen, Germany
[9] IRCCS Regina Elena Natl Canc Inst, Dept Oncol Orthoped, Rome, Italy
[10] Klinikum Stuttgart Olgahosp, Stuttgart, Germany
[11] Ctr Leon Berard, Lyon, France
[12] UCBL1, Lyon, France
[13] Gustave Roussy, Radiat Oncol Dept, Villejuif, France
[14] Inst Curie, Dept Surg, Paris, France
[15] Bioclin Thessaloniki, Thessaloniki, Greece
[16] Leiden Univ Med Ctr, Dept Pathol, Leiden, Netherlands
[17] Norwegian Radium Hosp, Oslo Univ Hosp, Dept Oncol, Oslo, Norway
[18] Royal Manchester Childrens Hosp, Paediat Oncol, Manchester, Lancs, England
[19] Med Univ Wien, Vienna Gen Hosp AKH, Vienna, Austria
[20] Ctr Riferimento Oncol Aviano, Aviano, Italy
[21] Hosp Univ Virgen del Rocio, CIBERONC, Seville, Spain
[22] Univ Seville, Sch Med, Dept Normal & Pathol Cytol & Histol, Seville, Spain
[23] Hub, Integrated Unit ICO Hosp, Barcelona, Spain
[24] Ctr Leon Berard, Dept Oncol Med, Lyon, France
[25] Skane Univ Hosp Lund, Lund, Sweden
[26] Univ Turin, Regina Margherita Childrens Hosp, Paediat Oncohaematol Dept, Dept Publ Hlth & Pediat, Turin, Italy
[27] PA Herzen Canc Res Inst, Moscow, Russia
[28] IRCCS Regina Elena Natl Canc Inst, Sarcomas & Rare Tumors Unit, Rome, Italy
[29] Fdn IRCCS Ist Nazl Tumori, Pediat Oncol Unit, Milan, Italy
[30] Fdn IRCCS Ist Nazl Tumori, Dept Canc Med, Milan, Italy
[31] Azienda Osped Univ Careggi Firenze, Florence, Italy
[32] Leiden Univ Med Ctr, Dept Med Oncol, Leiden, Netherlands
[33] Ctr Leon Berard Lyon, Lyon, France
[34] FPO IRCCS, Candiolo Canc Inst, Candiolo, Italy
[35] Netherlands Canc Inst, Dept Radiotherapy, Amsterdam, Netherlands
[36] Leiden Univ Med Ctr, Dept Radiotherapy, Leiden, Netherlands
[37] Oxford Univ Hosp NHS Fdn Trust, Oxford, England
[38] Univ Oxford, Oxford, England
[39] Fdn Jimenez Diaz Univ Hosp, Dept Med Oncol, Adv Therapies Sarcoma Lab, Madrid, Spain
[40] Mannheim Univ Med Ctr, Mannheim, Germany
[41] Helsinki Univ Hosp HUH, Helsinki, Finland
[42] Univ Helsinki, Helsinki, Finland
[43] Royal Marsden Hosp, Sarcoma Unit, London, England
[44] Univ Libre Bruxelles, Inst Jules Bordet, Med Oncol Clin, Brussels, Belgium
[45] Univ Med Ctr Groningen, Groningen, Netherlands
[46] St Anna Childrens Hosp, Dept Pediat, Vienna, Austria
[47] Med Univ Vienna, Childrens Canc Res Inst, Vienna, Austria
[48] Natl Canc Ctr, Dept Musculoskeletal Oncol, Tokyo, Japan
[49] Univ Hosp Motol, Prague, Czech Republic
[50] Masaryk Mem Canc Inst, Brno, Czech Republic