作者： Monica Gandhi , David V Glidden , Albert Liu , Peter L Anderson , Patricia Defechereuz
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摘要: • Whole blood collected for DBS prep routinely 4 and 8 weeks after PrEP initiation, then every 12 weeks• Hair samples collected from consenting participants on opt-in basis every 12 weeks• Hair levels of TFV/FTC and DBS levels of TFV-DP and FTC-triphosphate (FTC-TP) measured via liquid chromatography/tandem mass spectrometry