RT Journal Article SR Electronic T1 DISCUSSION JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 141 OP 142 DO 10.1136/sti.27.3.141 VO 27 IS 3 YR 1951 UL http://sti.bmj.com/content/27/3/141.abstract AB