RT Journal Article SR Electronic T1 Notes JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 381 OP 381 DO 10.1136/sti.50.5.381-a VO 50 IS 5 YR 1974 UL http://sti.bmj.com/content/50/5/381.2.abstract AB