RT Journal Article SR Electronic T1 CORRECTION JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 421 OP 421 DO 10.1136/sti.2007.stBEjune07.corr1 VO 83 IS 5 YR 2007 UL http://sti.bmj.com/content/83/5/421.2.abstract AB