title: FDA notifications. Gilead issues letter about virologic failure.
mesh_terms: D004345:Drug Industry / Q000458:organization & administration*; D024882:Drug Resistance, Viral; D004359:Drug Therapy, Combination; D015658:HIV Infections / Q000188:drug therapy* / Q000821:virology; D006801:Humans; D010865:Pilot Projects; D018894:Reverse Transcriptase Inhibitors / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D014481:United States; D014486:United States Food and Drug Administration; D019562:Viral Load
chemical_list: D018894:Reverse Transcriptase Inhibitors