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Large method differences for free thyroid hormone assays in the hyperthyroid range can affect assessment of hyperthyroid status: Comparison of Abbott Alinity to Roche Cobas, Siemens Centaur and equilibrium dialysis LC-MS/MS.
Westbye AB, Aas FE, Dahl SR, Zykova SN, Kelp O, Dahll LK, Thorsby PM. Westbye AB, et al. Among authors: kelp o. Clin Biochem. 2023 Nov;121-122:110676. doi: 10.1016/j.clinbiochem.2023.110676. Epub 2023 Oct 15. Clin Biochem. 2023. PMID: 37848158 Free article.