1. Department of Epidemiology, College of Public Health, Zhengzhou University , Zhengzhou, Henan 450001 , People’s Republic of China
2. Henan Provincial People’s Hospital , Zhengzhou, Henan 450001 , People’s Republic of China
3. Henan Key Laboratory of Molecular Medicine, Zhengzhou University , Zhengzhou, Henan 450001 , People’s Republic of China