1. From Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
2. From Department of Cardiology, the First Hospital of Qinhuangdao City, Qinhuangdao, Hebei Province, China
3. From Department of Cardiology, the Central Hospital of Xinxiang, Xinxiang, Henan Province, China