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Fig. 1.

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Fig. 1.

Comparison plots between LC-MS/MS and immunoassays. Top: (A) Passing-Bablok regression and (B) Bland-Altman plot to compare salivary melatonin concentrations measured by LC-MS/MS assay and ELISA. Bottom: (C) Passing-Bablok regression and (D) Bland-Altman plot to compare salivary cortisol concentrations measured by LC-MS/MS assay and ECLIA.

Abbreviations: LC-MS/MS, liquid chromatography-tandem mass spectrometry; ECLIA, electrochemiluminescence immunoassay.

Ann Lab Med 2021;41:108~113 https://doi.org/10.3343/alm.2021.41.1.108

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