C

Inappropriately low TSH values could be checked by a TRH-stimulation test, which is expected to elevate TSH more than 2-fold (≥4.0 mIU/L increment) in normal individuals (204). In cases where TSH appears inappropriately elevated, a thyroid hormone suppression test (1mg L-T4 or 200µg L-T3, po) would be expected to suppress serum TSH more than ... ................
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