title: Drug companies seek trial participants.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D004345:Drug Industry; D004359:Drug Therapy, Combination; D017320:HIV Protease Inhibitors / Q000008:administration & dosage*; D015277:Hotlines; D006801:Humans; D018579:Patient Selection; D014481:United States; D016047:Zalcitabine / Q000008:administration & dosage*; D015215:Zidovudine / Q000008:administration & dosage*
chemical_list: D017320:HIV Protease Inhibitors; D015215:Zidovudine; D016047:Zalcitabine