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Neopterin. The graph shows levels of neopterin (nM) measured in CSF (triangles) and plasma (squares) obtained from participants in each group. HC, HIV controllers (blue shapes); NC, noncontrollers (red shapes); Tx, subjects on ART with VL <50 (green shapes); Neg, HIV-negative controls (black shapes). Lines and asterisks above the graphs indicate p values for statistically significant differences between groups (*p < .05; **p < .01; ***p < .001).
