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 216 OP 216 DO 10.1136/sti.51.3.216 VO 51 IS 3 YR 1975 UL http://sti.bmj.com/content/51/3/216.abstract AB