Fig. 3From: Reduced antiretroviral drug efficacy and concentration in HIV-infected microglia contributes to viral persistence in brainIntracellular and extracellular ART drug concentrations in HFM and PBMCs. HFM (a) and PBMCs (b) were exposed to DRV and RAL at different concentrations for 24 h. Intracellular and extracellular concentrations were measured by HPLC–MS. * p < 0.05; ** p < 0.01; *** p < 0.001Back to article page