[1] Capital Med Univ, Coll Nursing, 10 You An Men Wai Xi Tou Tiao, Beijing 100069, Peoples R China
[2] Zhengzhou Univ, Henan Prov Peoples Hosp, Peoples Hosp, Henan Key Lab Nursing,Dept Comprehens Cardiovasc, 7 Weiwu Rd, Zhengzhou 450003, Henan, Peoples R China
[3] Capital Med Univ, Beijing Chaoyang Hosp, Dept Cardiol Ctr, 8 South Rd Workers Stadium, Beijing 100020, Peoples R China