1. University Department of Obstetrics & Gynaecology, San Salvatore Hospital, L’Aquila, Italy
2. Department of Life, Health and Environmental Sciences, University of L’Aquila, L’Aquila, Italy
3. Neonatal Intensive Care Unit, Medical and Surgical Department of Fetus-Newborn-Infant, “Bambino Gesù” Children’s Hospital IRCCS, Rome, Italy
4. Department of Neonatal Medicine and Surgery, Bambino Gesù Children’s Hospital, IRCCS, Rome, Italy
5. Neonatology Unit, San Salvatore Hospital, L’Aquila, Italy