1. Pediatric Oncology Unit Fondazione IRCCS Istituto Nazionale Tumori Milan Italy
2. Department of Oncology and Hemato‐oncology University of Milan Milan Italy
3. Evaluative Epidemiology Unit, Department of Epidemiology and Data Science Fondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
4. Hematology Oncology Division University of Padua Padua Italy
5. Department of Women's and Children's Health University of Padua Padua Italy
6. Hematology/Oncology Ospedale Pediatrico Bambino Gesù IRCCS Rome Italy