1. Department of Health Statistics, Shanxi Provincial Key Laboratory of Major Diseases Risk Assessment, School of Public Health, Shanxi Medical University, 56 South XinJian Road, Taiyuan, Shanxi Province 030001, People’s Republic of China
2. Department of Cardiology, First Hospital of Shanxi Medical University, 85 South XinJian Road, Taiyuan, Shanxi Province 030001, People’s Republic of China