1. Department of Cardiology, Shengjing Hospital of China Medical University, Shenyang, China
2. Department of Cardiology, The First Hospital of China Medical University, Shenyang, China
3. Department of Clinical Epidemiology, Shengjing Hospital of China Medical University, Shenyang, China
4. Department of Epidemiology, School of Public Health, China Medical University, Shenyang, China