title: One step back.
authors: P
authors: P
authors: Mason
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000188:drug therapy / Q000451:nursing / Q000517:prevention & control*; D015658:HIV Infections / Q000188:drug therapy* / Q000451:nursing; D006801:Humans; D015215:Zidovudine / Q000627:therapeutic use*
chemical_list: D015215:Zidovudine