RT Journal Article SR Electronic T1 Brief Encounters JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 173 OP 173 DO 10.1136/sti.79.3.173 VO 79 IS 3 A1 Ward, Helen YR 2003 UL http://sti.bmj.com/content/79/3/173.abstract AB