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. 2008 Jul 3;116(11):1526–1532. doi: 10.1289/ehp.11536

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Sex hormone concentrations of toads from nonagricultural and agricultural sites separated by sex group. (A) E₂ concentrations. (B) Testosterone concentrations. (C) E₂/testosterone ratio across sex groups. NAg, toads collected from nonagricultural areas; all other toads were collected from agricultural areas. Error bars are 95% confidence intervals around the mean of the untransformed data. Statistical analyses were conducted on transformed values.