title: San Francisco begins trial of 'morning after' regimen.
mesh_terms: D019380:Anti-HIV Agents / Q000627:therapeutic use*; D004359:Drug Therapy, Combination; D015658:HIV Infections / Q000517:prevention & control*; D006801:Humans; D016485:Needle Sharing; D012495:San Francisco; D012725:Sexual Behavior
chemical_list: D019380:Anti-HIV Agents