1. Life Sciences Institute, Zhejiang University; Hangzhou China
2. University of Hawaii Cancer Center, Cancer Biology Program (Ji), Epidemiology Program (Zheng); Honolulu HI
3. Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute; Bethesda MD
4. Department of Gastroenterology; Kanazawa University Hospital; Kanazawa Japan
5. Department of Cell Biology and Physiology and Program in Molecular Biology and Biotechnology; UNC School of Medicine; Chapel Hill NC
6. Genetics Branch; Center for Cancer Research, National Cancer Institute; Bethesda MD
7. Laboratory of Experimental Carcinogenesis, National Cancer Institute, National Institutes of Health; Bethesda MD