1. Unit of Epidemiology Meyer Children’s University Hospital Florence Italy
2. Unit of Epidemiology Regional Health Agency of Tuscany Florence Italy
3. Quality and Equity Unit Regional Health Agency of Tuscany Florence Italy
4. Department of Emergency Medicine and Trauma Center Meyer Children's University Hospital Florence Italy
5. Division of Neonatology and Pediatrics Versilia Hospital Viareggio Italy
6. Azienda USL Toscana Nord Ovest Pisa Italy