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Mean expression levels of surface markers between rural Africans (closed bars, n = 21) and Caucasians (open bars, n = 21) based on surface marker by subset. (A) HLA-DR, (B) CCR2, (C) CX3CR1. 1: regCD14; 2: dpCD14; 3: HLADRhi; 4: dpCD16; 5: regCD16. Significant p values from Mann Whitney test are represented by * (p ≤ 0.05) and ** (p ≤ 0.001).
