1. Department
of Epidemiology, Qidong Liver Cancer Institute, Qidong, 226200, Jiangsu, China
2. Department
of Epidemiology, Tumor Hospital, Nantong University, Nantong 226361, Jiangsu, China
3. Department of Pharmacology & Chemical Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15261 United States
4. Department
of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland 21205 United States