1 Department of Obstetrics and Gynecology, University of Florence, Florence, Italy.
2 Department of Neuroscience, Reproductive Sciences and Dentistry, School of Medicine, University of Naples Federico II, Naples, Italy.
3 Department of Gynecological, Obstetrical and Urological Sciences, Sapienza University of Rome, Rome, Italy.
4 Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, Pennsylvania, USA.