RT Journal Article SR Electronic T1 Surveillance: information for action JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 158 OP 158 DO 10.1136/sti.2004.011098 VO 80 IS 3 A1 H Ward YR 2004 UL http://sti.bmj.com/content/80/3/158.1.abstract AB