1. Second Department of Pediatrics, University of Bari
2. Departments of Pediatrics, Universities of Milano
3. Departments of Pediatrics, Universities of Pisa
4. Departments of Pediatrics, Universities of Bologna
5. Departments of Pediatrics, Universities of Napoli
6. Departments of Pediatrics, Universities of Palermo
7. Departments of Pediatrics, Universities of Roma
8. Bambin Gesù's Hospital‐Roma
9. Institute of Hematology‐Roma