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BACKGROUND Gestational thyrotoxicosis may be more prevalent in Asian women. METHODS We have measured thyroid function, ferritin and bone specific alkaline phosphatase (BALP) as peripheral markers of thyroid function and hCG in Asian and western Caucasian women in non-pregnant and early pregnancy. RESULTS TSH was lower in Asian women in non-pregnancy but(More)
To the Editor: Comparisons of the Vitros ECi thyroid-stimulating hormone (TSH) method with the AxSym (1 ), Immulite (1, 2), Elecsys (2 ), and ADVIA Centaur (2 ) have shown an unexplained progressive negative bias ,0.2 mIU/L, a phenomenon that we have also observed (Fig. 1A). To investigate the bias, we diluted the TSH International Reference Preparation(More)
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