1. Oncohematology Division Department of Women's and Children's Health Padova University Hospital Padua Italy
2. Pediatric Oncology Unit Fondazione IRCCS Istituto Nazionale Tumori Milan Italy
3. ‘Lalla Seragnoli’ Pediatric Oncology and Hematology Unit S Orsola‐Malpighi Hospital Bologna Italy
4. Department of Pediatric Oncology Ospedale Santobono‐Pausilipon Naples Italy
5. Pediatric Oncohematology Unit Department of Clinical and Experimental Medicine University of Catania Catania Italy