[1] Univ Leeds, Leeds Inst Canc & Pathol, Leeds Inst Oncol, Leeds, W Yorkshire, England
[2] Univ Leeds, St Jamess Univ Hosp, Leeds, W Yorkshire, England
[3] Olga Hosp, Klinikum Stuttgart, Ctr Pediat & Adolescent Med, Pediat Oncol Hematol Immunol 5, Stuttgart, Germany
[4] Inst Gustave Roussy, Dept Children & Adolescents Oncol, Villejuif, France
[5] Univ Munster, Univ Hosp Muenster, Dept Pediat Hematol & Oncol, D-48149 Munster, Germany
[6] Hosp Infantil Univ Nino Jesus, Madrid, Spain
[7] Inst Portugues Oncol Lisboa, Lisbon, Portugal
[8] Teenage Canc Trust, London, England
[9] Semmelweis Univ, H-1085 Budapest, Hungary
[10] Univ Oxford, Clin Acad Grad Sch, Oxford, England
[11] Lund Univ, Skane Univ Hosp, Dept Pediat, Clin Sci, Lund, Sweden
[12] Univ Med Ctr Ljubljana, Div Pediat, Unit Hematooncol, Ljubljana, Slovenia
[13] Charles Univ Prague, Prague, Czech Republic
[14] Med Univ Varna, Varna, Bulgaria
[15] Skubiszewski Med Univ Lublin, Childrens Univ Hosp, Lublin, Poland
[16] Inst Curie, Dept Med & Pediat Oncol, Paris, France
[17] Alder Hey Childrens NHS Fdn Trust, Liverpool, Merseyside, England
[18] Spanish Assoc Adolescents & Young Adult Canc, London, England
[19] St James Univ Hosp, Teenage Canc Trust Unit, Leeds, W Yorkshire, England
[20] Univ Athens, Sch Med, GR-11527 Athens, Greece
[21] Aarhus Univ Hosp, Dept Oncol, DK-8000 Aarhus C, Denmark
[22] Univ Hosp Leuven, Dept Pediat Hematooncol, Leuven, Belgium
[23] Oslo Univ Hosp, Inst Canc Res, Oslo, Norway
[24] Radboud Univ Nijmegen, Med Ctr, Dept Med Oncol, NL-6525 ED Nijmegen, Netherlands
[25] Fdn IRCCS Ist Nazl Tumori, Pediat Oncol Unit, Milan, Italy