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Abstract Background The functional unit of the kidney is the nephron. Because glomerular filtration is the initiating phase of all nephron functions, quantitative or qualitative assessment of the glomerular filtration rate (GFR), or some variable that bears a reasonably constant…

Abstract Background One of the most important elements of a laboratory test result is the reference interval, a set of values against which physicians compare their patients’ test results, facilitating interpretation. It is extremely important, therefore that the laboratory community…