1. Department of Cardiology, The Sixth Medical Center of PLA General Hospital, Beijing, China
2. Hu Dayi Cardiac Center of Hainan, The Second People's Hospital of Hainan, Wuzhishan, Hainan, China
3. Navy Clinical College, The Fifth School of Clinical Medicine, Anhui Medical University, Hefei, Anhui, China
4. Department of Cardiology, Jincheng Heju Cardiovascular Cerebrovascular Disease Hospital, Shanxi, China