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OBJECTIVE To determine second trimester reference intervals for TSH and FT4. DESIGN Samples from 3102 subjects were tested for TPO and Tg antibodies. METHODS Elecsys E170 reference intervals for TSH and FT4 were determined using antibody-negative samples. RESULTS Second trimester reference intervals for TSH and FT4 were 0.18-4.07 mIU/L and 9.5-15.8(More)
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