University of Bern - Childhood Cancer Research Group, University of Bern - Childhood Cancer Research Group, University of Geneva - Cansearch Research Laboratory, St. Jude Children's Research Hospital - Department of Epidemiology, University of Lausanne - Lausanne University Hospital, University of Texas at Houston - MD Anderson Cancer Center, Emory University - Aflac Cancer and Blood Disorders Center, University of Geneva - Paediatric Onco-Haematology Unit, University of Bern - Childhood Cancer Research Group, Government of the United States of America - National Cancer Institute, University of Basel - Division of Paediatric Oncology/ Haematology, St. Jude Children’s Research Hospital - Department of Epidemiology and Cancer Control, Duke University - Duke Cancer Institute and University of Bern - Childhood Cancer Research Group

Fondazione IRCCS Istituto Nazionale dei Tumori - Department of Research, Azienda Ospedaliero Universitaria di Modena - Department of Oncology, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Bern - Childhood Cancer Research Group, University of Lübeck - Institute of Social Medicine & Epidemiology, affiliation not provided to SSRN, University of Geneva, Centro di Riferimento Oncologico, Fondazione IRCCS Istituto Nazionale dei Tumori, Istituto Superiore di Sanità, European Institute of Oncology IRCCS and Fondazione IRCCS Istituto Nazionale dei Tumori - Department of Research