RT Journal Article SR Electronic T1 Correction JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 328 OP 328 DO 10.1136/sti.2008.029512.corr1 VO 84 IS 4 YR 2008 UL http://sti.bmj.com/content/84/4/328.2.abstract AB