1. Pediatric Oncology UnitFondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
2. Department of Pediatric Hematology and OncologyFondazione IRCCS Policlinico San Matteo Pavia Italy
3. Pediatric DepartmentUniversity of Milano BicoccaMBBM FoundationASST Monza Ospedale San Gerardo Monza Italy
4. Oncology UnitOspedale dei BambiniASST–Spedali Civili of Brescia Brescia Italy
5. Pediatric Oncology UnitPapa Giovanni XXIII Hospital Bergamo Italy
6. Pediatric DepartmentASST–Sette LaghiF. Del Ponte Hospital Varese Italy