1. Division of Gynecology and Obstetrics, Department of Surgical Sciences, University of Cagliari, 09124 Cagliari, Italy
2. ASSL Lanusei, ATS Sardinia, Obstetrics and Gynecology Unit, 08045 Lanusei, Italy
3. Department of Surgical Sciences, Neonatal Intensive Care Unit, Puericulture Institute, and Neonatal Section, University of Cagliari, 09124 Cagliari, Italy
4. Department of Prenatal and Preimplantation Genetic Diagnosis and Fetal Therapy, Ospedale Pediatrico Microcitemico A. Cao, 09124 Cagliari, Italy
5. Department of Biomedical Sciences, Unit of Clinic Metabolomics, University of Cagliari, 09124 Cagliari, Italy