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Measurement of human serum unconjugated estriol without derivatization using liquid chromatography-tandem mass spectrometry candidate reference method and compared with two immunoassays

Gas ChromatographyMedicineBioanalysisMass SpectrometryGynecologyAnalytical ChemistryLiquid ChromatographyClinical ChemistryHuman SerumEndocrinologyPharmacologyChromatographic AnalysisChromatographyDrug Analysis