RT Journal Article SR Electronic T1 Laboratory techniques in the diagnosis of syphilis: a review. JF Genitourinary Medicine JO Genitourin Med FD BMJ Publishing Group Ltd SP 413 OP 419 DO 10.1136/sti.68.6.413 VO 68 IS 6 A1 van der Sluis, J J YR 1992 UL http://sti.bmj.com/content/68/6/413.abstract AB