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Metabolism of estrogen. Reprinted from Cancer letters, 211, Takahashi M, Shimomoto T, Miyajima K, et al., Effects of estrogens and metabolites on endometrial carcinogenesis in young adult mice initiated with N-ethyl-N1-nitro-N-nitroguanidine, 1–9, Copyright (2004) with permission from Elsevier.
