1. PICU, Emergency Department and Institute of Anaesthesia/Intensive CareM, Catholic University Medical School UCSC, Rome; Neonatal ICU
2. S. Camillo-Forlanini Hospital Rome; Department of Paediatrics, Catholic University Medical School, Rome
3. Infectious Diseases Unit and ICU Bambino Gesù Paediatric Hospital, Rome, Italy
4. Department of Paediatric Sciences, Catholic University Medical School, Rome