1. Hubei Key Laboratory of Embryonic Stem Cell Research; Taihe Hospital, Hubei University of Medicine; Shiyan Hubei 442000 China
2. Human Reproductive Medical Center of Nanning Second People's Hospital; The Third Affiliated Hospital of Guangxi Medical University; Nanning 530031 China
3. College of Life Science and Bioengineering; Beijing University of Industry; Beijing 100124 China