Frentz, D.

resistance patient prevalence mutation antiretroviral drug resistance study transmission genotypic infection treatment europe subtype therapy virus drug resistance mutations nnrti baseline genotypic testing system testing inhibitor group failure country transcriptase baseline chapter antiretroviral therapy virological antiretroviral drug resistance protease class antiretroviral drugs analysis interpretation polymorphism score america change individual level heterosexual response sequence cluster cost-effectiveness trend difference spread interpretation systems result epidemiology regimen drug-resistant hiv africa heterosexual patients population drug-resistant number transcriptase inhibitors netherland ratio university increase immunodeficiency tdrm prevalence proportion surveillance virological failure count drug classes table world coordinator injection drug users time trends european combination antiretroviral therapy transcriptase inhibitor impact