1. Department of Emergency, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
2. Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
3. Departmant of General Medicine, Traditional Chinese Medicine Hospital of Jiangsu Province, Nanjing, Jiangsu 210004, P.R. China
4. Department of Cardiology, YinZhou Hospital Affiliated to Medical School of Ningbo University, Ningbo, Zhejiang 315040, P.R. China