RT Journal Article SR Electronic T1 Chlamydia screening and sexual health JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 396 OP 397 DO 10.1136/sti.78.6.396 VO 78 IS 6 A1 G J Hart A1 B Duncan A1 K A Fenton YR 2002 UL http://sti.bmj.com/content/78/6/396.abstract AB