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 7 OP 11 DO 10.1136/sti.29.1.7 VO 29 IS 1 YR 1953 UL http://sti.bmj.com/content/29/1/7.abstract AB