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Changes in circulating TSH, T3 and T4 levels in addition to weights of thyroid glands in the euthyroid and hypothyroid rats. Differences between the means were analyzed using Student's t-test (n=5 per group; *P<0.05 vs. euthyriod)’). The bars represent the mean ± standard error of the mean. TSH, thyroid stimulating hormone; T3, triiodothyronine; T4, thyroxine.
