1. Department of Health Promotion, Mother-Child Care, Internal Medicine and Medical Specialties “G. D’Alessandro”, Neonatal Intensive Care Unit, University Hospital “P. Giaccone”, Palermo, Italy
2. Department of Health Promotion, Mother-Child Care, Internal Medicine and Medical Specialties “G. D’Alessandro”, Pediatric Surgery Unit, University Hospital “P. Giaccone”, Palermo, Italy