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During a normal menstrual cycle, serum levels of luteinizing hormone (LH), follicle-stimulating hormone (FSH), estradiol, and progesterone can vary widely between cycles for the same woman, as well as between different woman. Reliable reference values based on the local population are important for correct interpretation of laboratory results. The purpose(More)
BACKGROUND The IFCC Committee for Standardization of Thyroid Function Tests aims at equivalence of laboratory test results for free thyroxine (FT4) and thyrotropin (TSH). OBJECTIVES This report describes the phase III method comparison study with clinical samples representing a broad spectrum of thyroid disease. The objective was to expand the feasibility(More)
To the Editor: We read with interest the recent report by Hendriks et al. (1) comparing processing capacity and efficiency for five different immunoassay ana-lyzers. As the authors correctly state, the great diversity in laboratory organization and function means that no two laboratories have exactly the same requirements of an immunoas-say analyzer. Given(More)
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