RT Journal Article SR Electronic T1 Abstracts JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 86 OP 96 DO 10.1136/sti.50.1.86 VO 50 IS 1 YR 1974 UL http://sti.bmj.com/content/50/1/86.abstract AB