1 Infertility Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
2 Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy.
3 Department of Gynecology, Obstetrics and Urology, "Sapienza" University of Rome, Rome, Italy.
4 Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy.
5 Division of Gynecology and Reproductive Medicine, Department of Gynecology, IRCCS Humanitas Research Hospital, Fertility Center, Rozzano, Milan, Italy.