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Laboratory Values 

Units of Measure

Phil B. Fontanarosa

and Stacy Christiansen

UPDATE: We will discontinue using quotation marks to identify parts of an article, but retain the capitalization; eg, This is discussed in the Methods section (not the “Methods” section). This change was made February 14, 2013. In JAMA and the Archives Journals, laboratory values for clinical chemistry analyses, hematologic tests, immunologic assays, metabolic and endocrine tests, therapeutic drug monitoring, toxicology determinations, and urinalysis are reported by means of conventional laboratory units. Table provides examples of conventional units and SI units for clinical laboratory measurement and is intended to facilitate conversion from conventional units to SI units (and vice versa). However,

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