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MedicineInternal MedicineGood Laboratory PracticeVitamin ChemistryVitamin DVitamin D DeficiencyVitamin D DisordersVitamin D MetabolismVitamin PhysiologyExternal Quality AttributesVitamin Assay DevelopmentVitamin D AssessmentVitamin D BiomarkersVitamin D Synthesis
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Susan S.-C. Tai, Mary Bedner, Karen W. Phinney · Analytical Chemistry · 2010 · 268 citations · Full text
Martin Kaufmann, John C. Gallagher, Munro Peacock et al. · The Journal of Clinical Endocrinology & Metabolism · 2014 · 249 citations · Full text
An international comparison of vitamin D metabolite measurements.
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