1. Department for the Protection of Women's Health and the Nascent Life; Division of Neonatology; Fondazione Poliambulanza; Brescia Italy
2. Department for the Protection of Women's Health and the Nascent Life, Child and Adolescent; Division of Neonatology; Fondazione Policlinico Universitario A. Gemelli; Università Cattolica del Sacro Cuore; Rome Italy
3. Division of Neonatology; Vilnius Maternity Hospital; Vilnius Lithuania
4. Faculty of Medicine; Institute of Clinical Medicine; Vilnius University; Vilnius Lithuania
5. NICU, Department of Clinical Sciences and Community Health, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico; Università degli Studi di Milano; Milan Italy
6. Section of Hygiene, Institute of Public Health; Università Cattolica del Sacro Cuore Rome; Rome Italy
7. Division of Neonatology; Azienda Ospedaliero; Universitaria Ospedali Riuniti di Foggia; Foggia Italy
8. Division of Neonatology; Ospedale San Pietro FBF; Rome Italy
9. Department of Pediatrics; NICU; Ospedale dei Bambini V. Buzzi; ASST-FBF-Sacco; Milan Italy
10. Division of Neonatology; Ospedale Pilippo del Ponte; Varese Italy