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Use of sep-pak ® cartridges for urinary steroid extraction: evaluation of the method for use prior to gas chromatographic analysis

UrologySeparation ScienceGas ChromatographySep-pak ® CartridgesMedicineBioanalysisAnalytical ChemistryUrinary Steroid ExtractionLiquid ChromatographyClinical ChemistryChromatographic AnalysisPharmacologyGas Chromatographic AnalysisSteroid MetabolismChromatographyDrug Analysis