[1] UCL Canc Inst, Dept Oncol, 72 Huntley St, London WC1A 6DD, England
[2] Univ Coll London Hosp, London, England
[3] Radboud Univ Nijmegen, Med Ctr, Nijmegen, Netherlands
[4] Vrije Univ Amsterdam, Med Ctr, Canc Ctr Amsterdam, Amsterdam, Netherlands
[5] Univ Hosp Basel, Bone Tumour Reference Ctr, Inst Pathol, Basel, Switzerland
[6] Wellcome Trust Sanger Inst, Cambridge, England
[7] Univ Klinikum Munster, Munster, Germany
[8] Olga Hosp, Klinikum Stuttgart, Stuttgart, Germany
[9] Oslo Univ Hosp, Oslo, Norway
[10] Hosp Univ Virgen Rocio, Seville, Spain
[11] Leiden Univ, Med Ctr, Leiden, Netherlands
[12] Univ Cambridge, Cambridge, England
[13] AOU Citta Salute & Sci, Regina Margherita Childrens Hosp, Turin, Italy
[14] Leiden Univ, Leiden, Netherlands
[15] Gustave Roussy Canc Campus, Villejuif, France
[16] Univ Sheffield, INSERM, EAL, Sarcoma Res Unit, Sheffield, S Yorkshire, England
[17] Univ Bergen, Bergen, Norway
[18] Tech Univ Munich, Munich, Germany
[19] Klinikum Kassel, Kassel, Germany
[20] UnivNantes, INSERM, UMR1238, Nantes, France
[21] Ist Ortoped Rizzoli, Bologna, Italy
[22] Clin Univ St Luc, Brussels, Belgium
[23] Catholic Univ Louvain, Brussels, Belgium