[1] Cent South Univ, Xiangya Sch Nursing, Changsha, Hunan, Peoples R China
[2] Shandong Xiehe Univ, Sch Nursing, Jinan, Shandong, Peoples R China
[3] Univ Turku, Dept Nursing Sci, Turku, Finland
[4] Cent South Univ, Dept Pediat, Xiangya Hosp 2, Changsha, Peoples R China