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Mean and standard deviation of serum total thyroxine (TT4) concentrations at baseline and after intravenous administration of 50 or 100 μg of freshly reconstituted or frozen recombinant human thyroid-stimulating hormone (rhTSH) in 14 healthy, 11 euthyroid sick, and 9 hypothyroid dogs. Dog groups with the same letter do not differ significantly.
