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Scatterplots showing correlations between hair tenofovir (TFV) and dried blood spot (DBS) TFV-diphosphate (DP) levels (A); hair TFV and DBS emtricitabine (FTC)-triphosphate (TP) levels (B); hair FTC and DBS FTC-TP levels (C); and hair FTC and DBS TFV-DP levels (D). Abbreviation: BLQ, below limit of quantification.
