Ornella Gonzato, Marie-cecile Ledeley, Emmy D.G. Fleuren, Hans Gelderblom, Marta Fiocco, Winette T. A. van der Graaf, Joachim Gerß, David Thomas, Jenny Potratz, Stefanie Hecker-Nolting, Craig Gerrand, Heinrich Kovar, Franck Tirode, Anne-Marie Cleton-Jansen, Piero Picci, Bernadette Brennan, Ola Myklebost, Javier Martin Broto, Judith V.M.G. Bovée, Michaela Nathrath, Piotr Rutkowski, Oscar M. Tirado, Aurélie Dutour, Nathalie Gaspar, Katia Scotlandi, Jeremy Whelan, Laurence Brugières, B. Hassan, Lindsey Bennister, Leo Kager, Gilles Vassal, Martin G. McCabe, Gunther Richter, Stefan S. Bielack, Carlo Lancia, Christopher Copland, Ruth Ladenstein, Stephanie Klco-Brosius, Jakob K. Anninga, Françoise Rédini, David Herrero-Martin, Markus Metzler, Franca Fagioli, Denise Reinke, Uta Dirksen, Stefano Ferrari, Sandra J. Strauss, Department of Paediatrics [Vienna, Austria], Saint Anna Children's Hospital [Vienna, Austria]-Medizinische Universität Wien = Medical University of Vienna, Children’s Cancer Research Institute [Vienna, Austria], University College London Hospitals (UCLH), Universitätsklinikum Münster [Munster, Germany], University of Oxford [Oxford], Leids Universitair Medisch Centrum [Leiden, The Netherlands], Sarcoma Patients Euronet [London, UK], Sarcoma UK, Central Manchester University Hospitals [Manchester, U.K.], Hospital Universitario Virgen del Rocío [Sevilla], Département de cancérologie de l'enfant et de l'adolescent [Gustave Roussy], Institut Gustave Roussy (IGR), CELT [York, UK], University of York [York, UK], Centre de Recherche en Cancérologie de Lyon (UNICANCER/CRCL), Centre Léon Bérard [Lyon]-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Regina Margherita University Children's Hospital [Turin, Italy], Istituto Ortopedico Rizzoli [Bologna, Italy], Radboud University Medical Centre [Nijmegen, The Netherlands], Newcastle upon Tyne Hospitals [Newcastle, UK], Institute of Cancer Research - ICR [London, U.K.], Klinikum Stuttgart-Olgahospital [Stuttgart, Germany], Molecular Oncology Laboratory [Barcelona, Spain] (Sarcoma Research Group), Institut d'Investigació Biomèdica de Bellvitge [Barcelone] (IDIBELL)-L’Hospitalet de Llobregat [Barcelona, Spain], Service de biostatistique et d'épidémiologie (SBE), Direction de la recherche clinique [Gustave Roussy], Institut Gustave Roussy (IGR)-Institut Gustave Roussy (IGR), University of Manchester [Manchester], Universitätsklinikum Erlangen [Erlangen, Germany], Oslo University Hospital [Oslo], Technische Universität Munchen - Université Technique de Munich [Munich, Allemagne] (TUM), Klinikum Kassel [Kassel, Germany], Physiopathologie des Adaptations Nutritionnelles (PhAN), Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Sarcoma Alliance through Research and Collaboration [Ann Arbor, USA], Maria Sklodowska-Curie Memorial Institute and Cancer Centre [Warsaw, Poland], Garvan Institute of Medical Research [Darlinghurst, Australia], Centre de recherche de l'Institut Curie [Paris], Institut Curie [Paris], The research leading to these results and the information described in this article have received funding from ENCCA-WP7: The European Union’s Seventh Framework Programme (FP7/2007-2013) under the project ENCCA, Grant agreement HEALTH-F2-2011-261474. EuroSarc: EU project FP7-HEALTH-2011-two-stage, Project ID 278742 EUROSARC. EEC: European Union’s Seventh Framework Programme for research, technological development and demonstration under Grant agreement no. 602856PROVABES: ERA-Net-TRANSCAN (01KT1310). PanCareLife: (602030-2) EU-FP7German Cancer Aid: DKH 108128. EURAMOS: The EURAMOS-group has received support from multiple funders (see Bielack et al., J Clin Oncol 33(20):2279-87, 2015)., European Project: 261474,EC:FP7:HEALTH,FP7-HEALTH-2010-single-stage,ENCCA(2011), European Project: 278742,EC:FP7:HEALTH,FP7-HEALTH-2011-two-stage,EUROSARC(2011), European Project: 602856,EC:FP7:HEALTH,FP7-HEALTH-2013-INNOVATION-1,EEC(2013), European Project: 602030,EC:FP7:HEALTH,FP7-HEALTH-2013-INNOVATION-1,PANCARELIFE(2013), Medizinische Universität Wien = Medical University of Vienna-Saint Anna Children's Hospital [Vienne] = St Anna Kinderspital (St. Anna Children's Hospital), University of Oxford, Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Radboud University Medical Center [Nijmegen], Institut National de la Recherche Agronomique (INRA)-Université de Nantes (UN), Garvan Institute of medical research, maurice, sandrine, EUROPEAN NETWORK for CANCER research in CHILDREN and ADOLESCENTS - ENCCA - - EC:FP7:HEALTH2011-01-01 - 2015-12-31 - 261474 - VALID, European Clinical trials in Rare Sarcomas within an integrated translational trial network - EUROSARC - - EC:FP7:HEALTH2011-12-01 - 2016-11-30 - 278742 - VALID, EURO EWING Consortium – International Clinical Trials to Improve Survival from Ewing Sarcoma - EEC - - EC:FP7:HEALTH2013-10-01 - 2018-09-30 - 602856 - VALID, and PanCare Studies in Fertility and Ototoxicity to Improve Quality of Life after Cancer during Childhood, Adolescence and Young Adulthood - PANCARELIFE - - EC:FP7:HEALTH2013-11-01 - 2018-10-31 - 602030 - VALID