1. Neonatal Intensive Care Unit, AUO Policlinico “Rodolico-San Marco”, University of Catania, Catania, Italy
2. General Pediatrics, Acute End Emergency Pediatric Unit, AUO Policlinico “Rodolico-San Marco”, University of Catania, Catania, Italy
3. Neonatal Intensive Care Unit, University Hospital “P. Giaccone”, Department of Sciences for Health Promotion, Maternal Infant Care, Internal Medicine and Medical Specialties “G. D’Alessandro”, Neonatal Intensive Care Unit, Via A. Giordano 3, 90127 Palermo, Italy
4. Neonatal Intensive Care Unit, Department of Pediatrics, University of Messina, Messina, Italy
5. Unit of Pediatrics and Pediatric Emergency, AUO Policlinico “Rodolico-San Marco”, Department of Clinical and Experimental Medicine Section of Pediatrics and Child Neuropsychiatry, AUO Policlinico Vittorio Emanuele, University of Catania, Catania, Italy