1. Dipartimento Materno-Infantile, Ospedale Maggiore, Bologna, Italy;
2. Department of Obstetrics and Gynaecology, General Faculty Hospital, Prague, Czech Republic;
3. Dipartimento della Salute della Donna, del Bambino e dell'Adolescente, Ospedale S. Orsola Malpighi, Bologna, Italy;
4. Department of Neonatology, Assistance Publique, Hôpitaux de Marseille, Marseille, France;
5. Department of Pediatrics, Maternity Hospital, Podoli, Prague, Czech Republic;
6. Dipartimento Materno-Infantile, Ospedale Niguarda Ca Granda, Milan, Italy;
7. Dipartimento Materno-Infantile, Ospedale Maggiore Policlinico, Mangiagalli e Regina Elena-Fondazione IRCCS-Università di Milano, Milan, Italy;
8. Department of Pediatrics, Maternidade Dr Alfredo Da Costa, Lisbon, Portugal;
9. Department of Pediatrics, Queen Charlotte's and Chelsea Hospital, London, England;
10. Department of Pediatrics, Holbaek Hospital, University of Copenhagen, Copenhagen, Denmark;
11. Neonatology Clinical Unit, Chiesi Farmaceutici SpA, Parma, Italy; and
12. Department of Child Health, Royal Maternity Hospital, Belfast, Northern Ireland