1. Department of Systems’ Medicine, Unit of Endocrinology, Section of Reproductive Endocrinology, “San Giovanni Calibita” Hospital, University of Rome Tor Vergata, Rome, Italy
2. Service of Medical Statistics & Information Technology, Fatebenefratelli Foundation for Health Research and Education, Rome, Italy
3. Department of Surgery, Unit of Obstetrics and Gynecology, University of Rome Tor Vergata, Rome, Italy
4. Unit of Endocrinology, Sant’Andrea Hospital, II Faculty of Medicine, University of Rome “Sapienza,” Rome, Italy
5. Unit of Obstetrics and Gynecology, “Santa Maria alle Scotte” Hospital, University of Siena, Siena, Italy
6. Department of Experimental Medicine, Unit of Endocrinology, “Policlinico Umberto I” Hospital, University of Rome “Sapienza,” Rome, Italy