[1] Chongqing Med Univ, Sch Basic Med, Dept Bioinformat, Chongqing, Peoples R China
[2] Chongqing Med Univ, Joint Int Res Lab Reprod & Dev, Minist Educ, Chongqing, Peoples R China
[3] Chongqing Med Univ, Women & Childrens Hosp, Dept Infect Controlling Sect, Chongqing, Peoples R China
[4] Chongqing Med Univ, Affiliated Hosp 1, Dept Obstet, Chongqing, Peoples R China
[5] Chongqing Med Univ, Box 197, 1 Yixueyuan Rd, Chongqing 400016, Peoples R China