[1] Jiangsu Univ, Affiliated Hosp 4, Reprod Ctr, Zhenjiang, Jiangsu, Peoples R China
[2] Jiangsu Univ, Affiliated Hosp 4, Dept Cent Lab, Zhenjiang, Jiangsu, Peoples R China
[3] First Peoples Hosp Nantong, Nantong, Peoples R China
[4] Jiangsu Univ, Affiliated Hosp, Dept Radiol, Zhenjiang, Jiangsu, Peoples R China