title: ACTG 320 trial halted as three-drug arm proves superior.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000188:drug therapy*; D019380:Anti-HIV Agents / Q000008:administration & dosage*; D018791:CD4 Lymphocyte Count / Q000187:drug effects; D002986:Clinical Trials as Topic; D018450:Disease Progression; D004359:Drug Therapy, Combination; D017320:HIV Protease Inhibitors / Q000008:administration & dosage*; D006801:Humans; D019469:Indinavir / Q000008:administration & dosage*; D019259:Lamivudine / Q000008:administration & dosage*; D014481:United States; D015215:Zidovudine / Q000008:administration & dosage*
chemical_list: D019380:Anti-HIV Agents; D017320:HIV Protease Inhibitors; D019259:Lamivudine; D015215:Zidovudine; D019469:Indinavir