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 136 OP 144 DO 10.1136/sti.42.2.136 VO 42 IS 2 YR 1966 UL http://sti.bmj.com/content/42/2/136.abstract AB