[1] Univ Hosp Padova, Dept Women & Children Hlth, Padua, Italy
[2] Veneto Inst Oncol IRCCS, Clin Trials & Biostat Unit, Padua, Italy
[3] Ctr Leon Berard, Inst Hematol & Oncol Pediat, Lyon, France
[4] Childrens Hosp Wales, Dept Paediat Oncol, Cardiff, S Glam, Wales
[5] Emma Childrens Hosp, Acad Med Ctr EKZ AMC, Amsterdam, Netherlands
[6] Gustave Roussy, Villejuif, France
[7] Inst Curie, Paris, France
[8] Oslo Univ Hosp, Dept Paediat & Adolescent Med, Oslo, Norway
[9] Royal Marsden NHS Fdn Trust, Children & Young Peoples Unit, Sutton, Surrey, England
[10] Fdn IRCCS Ist Nazl Tumori, Milan, Italy
[11] Univ Hosp Vall dHebron, Barcelona, Spain
[12] Ist Nazl Studio & Cura Tumori IRCCS, Milan, Italy