RT Journal Article SR Electronic T1 Chlamydia retest: how should we remind you? JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 553 OP 553 DO 10.1136/sextrans-2016-052666 VO 92 IS 7 A1 Sandra Downing A1 Colette Cashman YR 2016 UL http://sti.bmj.com/content/92/7/553.1.abstract AB