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Frequency of drug resistance mutations in eight sub-regions of Mexico. Mutations are divided by drug class: (a) NNRTIs, (b) NRTIs, (c) PIs, (d) INSTIs. All mutations considered in the Stanford HIVdb program were analysed. Mutations not observed in any of the regions are not shown. Scale for (a) is different from the rest. This figure appears in colour in the online version of JAC and in black and white in the printed version of JAC.
