1. Primary Care Pediatrics, ASL Salerno, Vietri sul Mare, Italy
2. Department of Public Health, Section of Hygiene, Università Cattolica del Sacro Cuore, Rome, Italy
3. Primary Care Pediatrics, ASL BN1, Benevento, Italy
4. Ismea, Istituto di Servizi per il Mercato Agricolo Alimentare, Rome, Italy
5. Department of Paediatrics, Fatebenefratelli Hospital, Benevento, Italy