RT Journal Article SR Electronic T1 Oxford Handbook of Genitourinary Medicine, HIV and AIDS JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 266 OP 266 DO 10.1136/sti.2005.018895 VO 82 IS 3 A1 G Sethi YR 2006 UL http://sti.bmj.com/content/82/3/266.1.abstract AB