Department of Cardiology, Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; National Clinical Research Center for Cardiovascular Diseases, Beijing, China. National Clinical Research Center for Cardiovascular Diseases, Beijing, China; Catheterization Laboratories, Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. Electronic address: bxu@citmd.com. Department of Cardiology, Chinese People's Liberation Army General Hospital, Beijing, China. Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China. Department of Cardiology, General Hospital of Ningxia Medical University, Yinchuan, China. Department of Cardiology, Meizhou People's Hospital, Meizhou, China. Department of Cardiology, Wuhan Asian Heart Hospital, Wuhan, China. Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China. Department of Cardiology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China. Department of Cardiology, Peking University People's Hospital, Beijing, China. Medical Research and Biometrics Center, National Center for Cardiovascular Diseases, Beijing, China. Catheterization Laboratories, Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. Shanghai MicroPort Medical (Group), Shanghai, China. Department of Cardiology, Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; National Clinical Research Center for Cardiovascular Diseases, Beijing, China. Electronic address: gaorunlin@citmd.com.