1. Department of Surgical Sciences, Division of Gynaecology and Obstetrics, University of Cagliari, Cagliari, Italy
2. Department of Chemical and Geological Sciences, University of Cagliari, Cagliari, Italy
3. Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
4. Department of Surgical Sciences, Neonatal Intensive Care Unit, Puericulture Institute and Neonatal Section, Azienda Ospedaliera Universitaria, Cagliari, Italy
5. Laboratory Medicine Service, IRCCS AOU San Martino-IST, University-Hospital, Genoa, Italy
6. Maternal Neonatal Department, Division of Gynaecology and Obstetrics, Massa Carrara Hospital, Carrara, Italy