1. Department of Cardiology, Hunan Provincial People's Hospital, Changsha, Hunan 410000, P.R. China
2. Department of Cardiology, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha, Hunan 410000, P.R. China
3. Department of Emergency, Hunan Provincial People's Hospital, Changsha, Hunan 410000, P.R. China
4. Institute of Clinical Pharmacology Research, Hunan Provincial People's Hospital, Changsha, Hunan 410000, P.R. China
5. Department of Cardiology, Xiangxi Autonomous Prefecture People's Hospital, Jishou, Hunan 416000, P.R. China