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Baseline HIV drug resistance mutations detected at different thresholds. Mutations detected at 1 to <20% represent low-frequency mutations detected by next-generation sequencing only. Mutations detected at ≥20% represent mutations detected by both Sanger sequencing and next-generation sequencing. NRTI, Nucleoside reverse-transcriptase inhibitor; NNRTI, non-nucleoside reverse transcriptase inhibitor; PI, Protease inhibitor.
