RT Journal Article SR Electronic T1 Surveillance of HIV testing: where should we go next? JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 364 OP 365 DO 10.1136/sti.2010.042788 VO 86 IS 5 A1 Tanya Welz YR 2010 UL http://sti.bmj.com/content/86/5/364.abstract AB