Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Employment or leadership: None declared.
Honorarium: None declared.
Competing interests: The funding organization(s) played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.
References
1. Ismail AA, Walker PL, Barth JH, Lewandowski KC, Jones R, Burr WA. Wrong biochemistry results: two case reports and observational study in 5310 patients on potentially misleading thyroid-stimulating hormone and gonadotropin immunoassay results. Clin Chem 2002;48:2023–9.10.1093/clinchem/48.11.2023Search in Google Scholar
2. Bjerner J, Bormer OP, Nustad K. The war on heterophilic antibody interference. Clin Chem 2005;51:9–11.10.1373/clinchem.2004.042994Search in Google Scholar PubMed
3. Kamikubo K, Komaki T, Nakamura S, Sakata S, Yasuda K, Miura K. Theoretical consideration of the effects of dilution on estimates of free thyroid hormones in serum. Clin Chem 1984;30:634–6.10.1093/clinchem/30.5.634Search in Google Scholar
4. Midgley JE. Direct and indirect free thyroxine assay methods: theory and practice. Clin Chem 2001;47:1353–63.10.1093/clinchem/47.8.1353Search in Google Scholar
5. Thienpont LM, Van Uytfanghe K, Poppe K, Velkeniers B. Determination of free thyroid hormones. Best Pract Res Clin Endocrinol Metab 2013;27:689–700.10.1016/j.beem.2013.05.012Search in Google Scholar PubMed
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