[1] Gustave Roussy, Direct Clin Res, Villejuif, France
[2] Univ Paris 11, Villejuif, France
[3] SIOP Europe Off, Brussels, Belgium
[4] Univ Med Ctr Schleswig Holstein, Kiel, Germany
[5] Union Natl Assoc Parents Enfants Atteints Canc Le, Montpellier, France
[6] Int Confederat Childhood Canc Parent Org ICCPO, Nieuwegein, Netherlands
[7] Med Univ Lublin, Dept Paediat Haematol Oncol & Transplantol, Lublin, Poland
[8] Univ Nottingham, Fac Med & Hlth Sci, Childrens Brain Tumour Res Ctr, Nottingham NG7 2RD, England
[9] Lund Univ, Skane Univ Hosp, Dept Paediat, Lund, Sweden
[10] Policlin Univ A Gemelli, Div Paediat Oncol, Rome, Italy
[11] UCL, Inst Child Hlth, London, England
[12] Univ Milano Bicocca, Dept Hlth Sci, Ctr Biostat Clin Epidemiol, Monza, Italy
[13] Univ Belgrade, Sch Med, Belgrade, Serbia
[14] Univ Childrens Hosp, Belgrade, Serbia
[15] Aarhus Univ Hosp Skejby, Dept Paediat, Aarhus, Denmark
[16] Univ Birmingham, Sch Canc Sci, Canc Res UK Clin Trials Unit CRCTU, Birmingham, W Midlands, England
[17] St Anna Kinderkrebsforsch eV, Childrens Canc Res Inst, Vienna, Austria