[1] Zhejiang Univ, Coll Med, Affiliated Hosp 1, Inst Cardiol, Hangzhou 310003, Zhejiang, Peoples R China
[2] Xinhua Hosp, Dept Cardiol, Hangzhou, Zhejiang, Peoples R China
[3] Zhejiang Univ, Coll Med, Sir Run Run Shaw Hosp, Inst Cardiol, Hangzhou 310003, Zhejiang, Peoples R China
[4] Zhejiang Univ, Coll Med, Affiliated Hosp, Dept Ultrasound, Hangzhou 310003, Zhejiang, Peoples R China