RT Journal Article SR Electronic T1 Guidelines for serological testing for syphilis JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 79 OP 79 DO 10.1136/sti.77.1.79 VO 77 IS 1 A1 McElborough, Denis J YR 2001 UL http://sti.bmj.com/content/77/1/79.1.abstract AB