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. 2013 Oct 3;16:18519. doi: 10.7448/IAS.16.1.18519

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© 2013 Rodriguez-Rodrigues N et al; licensee International AIDS Society

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Prevalence of primary resistance in the present study compared with our previous studies and according to drug class.

Arrows indicate significant trends in time according to Chi-square test for trend. (1) Kijak et al. [31]. (2) Dilernia et al. [32]. (3) Current study.