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 62 OP 67 DO 10.1136/sti.35.1.62 VO 35 IS 1 YR 1959 UL http://sti.bmj.com/content/35/1/62.abstract AB