[Sun, Bo] Shenzhen Baoan Womens & Childrens Hosp, Dept Obstet, Shenzhen 518101, Peoples R China.
[Sun, Bo; Jiang, Taotao; Luo, Liqiong] Second Peoples Hosp Shenzhen, Dept Obstet, Shenzhen 518035, Peoples R China.
[Chang, Wen-Lin; Gu, Yanli; Peng, Julan; Jiang, Taotao; Chang, WL; Luo, Liqiong; Dong, Shangkun] Southern Med Univ, Affiliated Longhua Peoples Hosp, Longhua Peoples Hosp, Dept Obstet, Shenzhen 518109, Peoples R China.
[Yong, Jiayao] Southern Med Univ, Dept Gynaecol & Obstet, Shenzhen Hosp, Shenzhen 510086, Peoples R China.
[Peng, Julan; Ji, Xinmei] Hunan Agr Univ, Coll Vet Med, Changsha 410128, Peoples R China.