Effectiveness of boosted lopinavir versus boosted atazanavir in HIV-1 infected patients switching to second-line antiretroviral therapy following failure of an NNRTI first line ART in a low/middle-income setting, a retrospective cohort study: the BaLANCe study. (August 2018) - Cesar, C.; Rolon, M.J.; Sisto, A.; Blugerman, G.; Cahn, F.; Yamamoto, C.; Wegzyn, C.; Madihlaba, T.; Pérez, H.; Cahn, P.