title: Placebo use defended in Third World studies.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000188:drug therapy*; D019380:Anti-HIV Agents / Q000627:therapeutic use*; D018849:Controlled Clinical Trials as Topic / Q000592:standards*; D003906:Developing Countries; D005260:Female; D006801:Humans; D010919:Placebos; D011247:Pregnancy; D015215:Zidovudine / Q000627:therapeutic use*
chemical_list: D019380:Anti-HIV Agents; D010919:Placebos; D015215:Zidovudine