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 60 OP 68 DO 10.1136/sti.34.1.60 VO 34 IS 1 YR 1958 UL http://sti.bmj.com/content/34/1/60.abstract AB