1. Cardiology Department, Hunan Provincial People's Hospital, Furong District, Changsha 410000, Hunan, China
2. Clinical Research Center for Heart Failure in Hunan Province, Furong District, Changsha 410000, Hunan, China
3. Institute of Cardiovascular Epidemiology, Hunan Provincial People's Hospital, Furong District, Changsha 410000, Hunan, China
4. Department of Cardiology, The Central Hospital of ShaoYang, Daxiang District, Shaoyang 422000, Hunan, China