1. Department of Obstetrics and Gynecology (D.M.), Faculty of Medicine, University of Torino, 10127 Torino, Italy;
2. Institute of Normal Human Morphology (D.M., A.G., F.V., M.C.), Faculty of Medicine, Polytechnic University of Marche, I-60020 Ancona, Italy;
3. Chair of Obstetrics and Gynaecology (G.F., P.F., F.P.), Department of Pediatrics, Obstetrics and Reproductive Medicine, University of Siena, 53100 Siena, Italy;
4. Dipartimento di Medicina Sperimentale e Sanità Pubblica (M.N.), University of Camerino, 62032 Camerino, Italy