title: Trial shows Nonoxynol 9 efficacy is questionable.
mesh_terms: D000890:Anti-Infective Agents / Q000627:therapeutic use*; D017280:Condoms; D015658:HIV Infections / Q000517:prevention & control; D006801:Humans; D017137:Nonoxynol / Q000627:therapeutic use*; D010919:Placebos; D016032:Randomized Controlled Trials as Topic; D011477:Sex Work; D012749:Sexually Transmitted Diseases / Q000517:prevention & control; D013089:Spermatocidal Agents / Q000627:therapeutic use*
chemical_list: D000890:Anti-Infective Agents; D010919:Placebos; D013089:Spermatocidal Agents; D017137:Nonoxynol