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Ethoxycoumarin O‐deethylation (ECOD) activities at substrate concentrations of 50 (A) or 500 (B) μM in rat livers. Animals were treated with ip injections of 200‐mg/kg TAA (n = 7) or saline (n = 7) three times a week for 10 weeks, followed by a 10‐day washout period. The symbols and horizontal lines indicate the individual and mean values, respectively. *, p < 0.05; two‐tailed unpaired t‐test, compared with the saline group
