RT Journal Article SR Electronic T1 Annotation JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 144 OP 145 DO 10.1136/sti.28.3.144 VO 28 IS 3 YR 1952 UL http://sti.bmj.com/content/28/3/144.abstract AB