[1] Chinese Univ Hong Kong, Dept Obstet & Gynaecol, Shatin, Hong Kong, Peoples R China
[2] Jinan Univ, Affiliated Hosp 2, Shenzhen Peoples Hosp, Dept Obstet & Gynaecol, Shenzhen, Peoples R China
[3] Sheffield Hallam Univ, Biomol Sci Res Ctr, Sheffield, S Yorkshire, England