[1]Chinese Peoples Liberat Army Gen Hosp, Dept Cardiol, Beijing, Peoples R China.
[2]Tianjin Chest Hosp, Dept Cardiol, Tianjin, Peoples R China.
[3]Nanjing First Hosp, Dept Cardiol, Nanjing, Jiangsu, Peoples R China.
[4]Capital Med Univ, Dept Cardiol, Beijing Friendship Hosp, Beijing, Peoples R China.
[5]Capital Med Univ, Dept Cardiol, Beijing Chao Yang Hosp, Beijing, Peoples R China.
[6]Capital Med Univ, Dept Cardiol, Beijing Anzhen Hosp, Beijing, Peoples R China.
[7]Daqing Oilfield Gen Hosp, Dept Cardiol, Daqing, Peoples R China.
[8]Cangzhou Cent Hosp, Dept Cardiol, Cangzhou, Peoples R China.
[9]Zhejiang Univ, Dept Cardiol, Affiliated Hosp 2, Sch Med, Hangzhou, Zhejiang, Peoples R China.
[10]Jilin Univ, Dept Cardiol, Hosp 1, Changchun, Jilin, Peoples R China.
[11]Zhejiang Univ, Dept Cardiol, Sir Run Run Shaw Hosp, Sch Med, Hangzhou, Zhejiang, Peoples R China.