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Bland-Altman Plot (n=98, HIV-infected individual whole blood samples) to establish agreement between the EasyCD4 assay and FACSCount for CD4+ T lymphocyte enumeration. CD4+ T lymphocyte count by FACSCount is divided into <200 cells/µL (red diamonds), 200-350 cells/µL (blue circles), and >350 cells/µL (black squares). The solid horizontal line represents the mean difference between the two systems.
