RT Journal Article SR Electronic T1 Contact tracing—where do we go from here? JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 313 OP 314 DO 10.1136/sti.74.5.313 VO 74 IS 5 A1 K Radcliffe A1 J Clarke YR 1998 UL http://sti.bmj.com/content/74/5/313.abstract AB