title: DISTINGUISHING PHYSIOLOGIC VARIATION FROM ANALYTIC VARIATION.
authors: Laboratory of Applied Studies, Division of Computer Research and Technology, National Institutes of Health, Public Health Service, Department of Health, Education and Welfare, Bethesda, Maryland 20014, USA.
authors: E K
authors: EK
authors: Harris
mesh_terms: D001774:Blood Chemical Analysis / Q000379:methods*; D006801:Humans; D012016:Reference Values; D015203:Reproducibility of Results