1. Department of Epidemiology and Biostatistics, Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, P.R. China
2. Hubei Provincial Clinical Research Center for Colorectal Cancer, Wuhan, Hubei, 430000, P.R. China
3. Wuhan Clinical Research Center for Colorectal Cancer, Wuhan, Hubei, 430000, P.R. China