[1] Cent South Univ, Xiangya Hosp 2, Clin Nursing Teaching & Res Sect, Changsha, Hunan, Peoples R China
[2] Cent South Univ, Xiangya Nursing Sch, Changsha, Hunan, Peoples R China
[3] Cent South Univ, Xiangya Hosp 2, Dept Thorac Surg, Changsha, Hunan, Peoples R China
[4] Cent South Univ, Xiangya Hosp 2, 139 Renmin Middle Rd, Changsha 410011, Hunan, Peoples R China