1. Paediatric Oncology Division Regina Margherita Children's Hospital AOU Città della Salute e della Scienza Turin Italy
2. Paediatric Oncology Unit Fondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
3. Hematology and Oncology Division Department of Women's and Children's Health University of Padova Padua Italy
4. Epidemiology and Biostatistics Unit and DOPO clinic IRCCS Istituto Giannina Gaslini Genoa Italy
5. Cardiovascular Disease Unit IRCCS Ospedale Policlinico San Martino Genoa Italy
6. University of Turin Turin Italy