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HIV Infections
HIV-1
HIV
Viral Drug Resistance
Mutation
Genotype
Drug Resistance, Multiple, Viral
Anti-HIV Agents
RNA, Viral
HIV Protease Inhibitors
Reverse Transcriptase Inhibitors
HIV Protease
HIV Reverse Transcriptase
Ritonavir
Viral Load
Retrospective Studies
Spain
CD4 Lymphocyte Count
Highly Active Antiretroviral Therapy
Drug Therapy, Combination
Co-Publications
100
28
26
25
24
21
19
15
11
8
7
6
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