1. Department of Cardiology, Hunan Provincial People's Hospital, Changsha 410000, China
2. Department of Epidemiology, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha 410000, China
3. Clinical Medicine Research Center of Heart Failure of Hunan Province, Changsha 410000, China
4. The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha 410000, China
5. Department of Emergency, Hunan Provincial People's Hospital, Changsha 410000, China
6. Clinical Data Center, Hunan Provincial People's Hospital, Changsha 410000, China