National Cancer Centre - Office of Cancer Screening, National Cancer Centre - Office of Cancer Screening, National Cancer Centre - Office of Cancer Screening, National Cancer Centre, Chinese Academy of Sciences (CAS) - Institute of Cancer and Basic Medicine (ICBM), Central South University - Hunan Cancer Hospital, Xuzhou Cancer Hospital, Anhui Provincial Cancer Hospital, Kunming Medical University - Third Affifiliated Hospital, Chinese Academy of Sciences (CAS), Chinese Academy of Sciences (CAS) - Cancer Hospital, Lanxi Red Cross Hospital, Central South University - Hunan Cancer Hospital, Xuzhou Cancer Hospital, Anhui Provincial Cancer Hospital, Kunming Medical University - Third Affifiliated Hospital, Taizhou Cancer Hospital, Lanxi Red Cross Hospital, Anhui Provincial Cancer Hospital, Hefei Centre for Disease Control and Prevention, Kunming Medical University - Third Affifiliated Hospital, Kunming Medical University - Third Affifiliated Hospital, National Cancer Centre - Office of Cancer Screening, National Cancer Centre - Office of Cancer Screening, Huazhong University of Science and Technology - Department of Epidemiology and Biostatistics, National Cancer Centre - Office of Cancer Screening, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Office of Cancer Screening, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Office of Cancer Screening, Huazhong University of Science and Technology - Department of Epidemiology and Biostatistics and Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital