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Interindividual variability in antiretroviral (ARV) concentrations seen even among virologically suppressed individuals. ARV concentrations in hair below the lower limit of quantification were set to 0.001. Abbreviations: ATV, atazanavir; DRV, darunavir; EFV, efavirenz; FTC, emtricitabine; NVP, nevirapine; RAL, raltegravir; TFV, tenofovir.
