[1] Sun Yat sen Univ, Affiliated Hosp 3, Dept Infertil & Sexual Med, 600 Tianhe Rd, Guangzhou 510630, Peoples R China
[2] Sun Yat sen Univ, Affiliated Hosp 3, Ctr Reprod Med, Guangzhou, Peoples R China
[3] Sapienza Univ Rome, Dept Expt Med, Sect Med Pathophysiol Food Sci & Endocrinol, Rome, Italy
[4] Univ Tor Vergata, Dept Syst Med, Rome, Italy