1. The Third Affiliated Hospital of Sun Yat-sen University Department of Infertility and Sexual Medicine, , Guangzhou, China
2. The Third Affiliated Hospital of Sun Yat-sen University Center of Reproductive Medicine, , Guangzhou, China
3. Sapienza University of Rome Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, , Rome, Italy
4. University of Tor Vergata Department of Systems Medicine, , Rome, Italy