Affiliation: | 1. Paediatric Department, University Hospital, Padova, Italy;2. Unit of Epidemiology, Bambino Gesù Children's Hospital, Rome, Italy;3. Department of Emergency Medicine, University Hospital, Padova, Italy;4. Department of Emergency Medicine, Burlo Garofolo Children's Hospital, Trieste, Italy;5. Department of Emergency Medicine, Bambino Gesù Children's Hospital, Rome, Italy;6. Research Unit of Perinatal Epidemiology, Bambino Gesù Children's Hospital, Rome, Italy |