[Zhang, Jingping; Zhou, Tianji; Yin, Yizhen] Cent South Univ, Xiangya Sch Nursing, 172 Tongzipo Rd, Changsha 410013, Hunan, Peoples R China.
[Zhang, Hanyi] Cent South Univ, Xiangya Hosp, 87 Xiangya Rd, Changsha 410008, Hunan, Peoples R China.
[Zhang, Jie] Hunan Univ Chinese Med, Sch Nursing, 300 Xueshi Rd, Changsha 410208, Hunan, Peoples R China.
[Xu, Xiaorong] Hunan Aerospace Hosp, Nursing Dept, 189 Fenglin Rd, Changsha 410205, Hunan, Peoples R China.