1. Department of Molecular and Developmental Medicine, Obstetrics and Gynecological Clinic, University of Siena, Siena, Italy
2. Department of Obstetrics and Gynecology, Francois Quesnay Hospital, Mantes-La-Jolie, France
3. Department of Obstetrics and Gynecology, Fondazione "Policlinico-Mangiagalli-Regina Elena" University of Milan, Milan, Italy