1. Department of Women's and Children's Health; Hematology/Oncology Division; Padova University Hospital; Padova Italy
2. Pediatric Oncology Unit; Fondazione IRCCS Istituto Nazionale Tumori; Milano Italy
3. Pediatric Oncology and Hematology Section; Santa Maria della Misericordia Hospital; Perugia Italy
4. Pediatric Hematology and Oncology; “G. Di Cristina” Children's Hospital, A.R.N.A.S.; Palermo Italy
5. Pediatric Surgery; IRCCS Cà Granda Ospedale Maggiore Policlinico; Milano Italy
6. Department Women's and Children's Health; Pediatric Surgery Division; Padova University Hospital; Padova Italy