[Zhu, Na; Gao, Hong; Yang, Xuyan] Univ South China, Affiliated Hosp 2, Hengyang Med Sch, Dept Nursing, Hengyang, Peoples R China.
[Zhu, Na; Chen, Yahui; Liu, Qiao] Univ South China, Sch Nursing, Hengyang, Peoples R China.
[Wang, Xiaolan] Univ South China, Affiliated Hosp 1, Ctr Reprod Med, Hengyang Med Sch, Hengyang, Peoples R China.
[Li, Huanhuan] Univ South China, Affiliated Hosp 2, Hengyang Med Sch, Dept Gynecol, Hengyang, Peoples R China.