RT Journal Article SR Electronic T1 Correction JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 534 OP 534 DO 10.1136/sextrans-2012-050686corr1 VO 89 IS 6 YR 2013 UL http://sti.bmj.com/content/89/6/534.1.abstract AB