[1] Beijing AnZhen Hosp, Cardiothorac Surg, Beijing, Peoples R China
[2] Beijing AnZhen Hosp, Echocardiog Dept, Beijing, Peoples R China
[3] Tsinghua Univ, Ctr Life Sci, Beijing, Peoples R China
[4] Beijing AnZhen Hosp, Beijing Inst Heart Lung & Blood Vessel Dis, Beijing, Peoples R China
[5] Beijing AnZhen Hosp, Cardiothorac Surg, Beijing, Peoples R China