Fig. 4From: Assessment of immune organ dysfunction in critical illness: utility of innate immune response markersFlow-cytometric assessment of monocytic HLA-DR expression. Upper row: after staining of EDTA samples with specific antibodies, HLA-DR expression is assessed on CD14+ monocytes by flow cytometry. Lower row: (left) Quantibrite™-PE beads are used to calculate a calibration curve (middle) for HLA-DR assessment on CD14+ monocytes. (Right) mean fluorescence intensity (MFI) values for HLA-DR on monocytes are converted in a given sample to molecules per cell using the calibration curveBack to article page