[Wolloh, Moses G., II; Liu, Xiaoqun] Cent South Univ, XiangYa Sch Publ Hlth, Dept Women & Children Hlth, Changsha, Hunan, Peoples R China.
[Wu, Weige; Liu, Farong; Wang, Wenqiang; Lu, Dali] Xiamen Xianyue Hosp, Xiamen, Fujian, Peoples R China.
[Qiu, Xiaoyan] Hunan Agr Univ, Inst Higher Educ, Yongzhou, Hunan, Peoples R China.
[Qing, Zaihua] Hunan Univ Finance & Econ, Off Student Affair, Changsha, Hunan, Peoples R China.
[Lin, Xiaoling] Sun Yat Sen Univ, Sch Nursing, Guangzhou, Guangdong, Peoples R China.