1. Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Tianjin, China
2. Department of Cancer Epigenetics Laboratory, First Affiliated Hospital of Henan University of Science and Technology, Luoyang, China
3. Hongqiao International Institute of Medicine, Shanghai Tongren Hospital/Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
4. Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI, USA