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(a) Fluorescent image of intracellular staining of a section through PBMC from a healthy control for HLA-DR expression. (b) The fluorescent image of a section though healthy control PBMC showing the surface expression of HLA-DR. (c) Fluorescent image of intracellular staining for HLA-DR of a section through PBMC from a septic patient. (d) shows the weak surface staining of HLA-DR in the same patients' PBMC.
