Inhibitory effect of (-)-epigallocatechin gallate on carcinogenesis with N-ethyl-N′-nitro-N-nitrosoguanidine in mouse duodenum - Fujita,Y.; Yamane,T.; Tanaka,M.; Kuwata,K.; Okuzumi,J.; Takahashi,T.; Fujiki,H.; Okuda,T. (Japanese Journal of Cancer Research, 1989)