1. Department of Echocardiography; Fuwai Hospital & Cardiovascular Institute; National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences & Tsinghua University; Peking Union Medical College; Beijing China
2. Department of Cardiovascular Surgery; Fuwai Hospital & Cardiovascular Institute; National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences & Tsinghua University; Peking Union Medical College; Beijing China