RT Journal Article SR Electronic T1 Management of difficult anogenital warts. JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 449 OP 450 VO 75 IS 6 A1 S Eggleton A1 A Tang YR 1999 UL http://sti.bmj.com/content/75/6/449.3.abstract