[1] Jiangsu Coll Nursing, Sch Nursing & Midwifery, Huaian 223005, Peoples R China
[2] Mahidol Univ, Fac Publ Hlth, Dept Publ Hlth Nursing, Bangkok 10400, Thailand
[3] Yancheng Third Peoples Hosp, Dept Gynecol, Yancheng 224000, Jiangsu, Peoples R China
[4] Southwest Med Univ, Sch Nursing, Luzhou 646000, Peoples R China
[5] Xinxiang Med Univ, Sch Nursing, Xinxiang 453003, Peoples R China