New STD guidelines issued by CDC.
D002487:Centers for Disease Control and Prevention, U.S.; D017137:Nonoxynol / Q000009:adverse effects / Q000627:therapeutic use; D017410:Practice Guidelines as Topic; D012749:Sexually Transmitted Diseases / Q000188:drug therapy* / Q000453:epidemiology / Q000517:prevention & control; D014481:United States
D017137:Nonoxynol