RT Journal Article SR Electronic T1 Sexually Transmitted Diseases JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 343 OP 344 DO 10.1136/sti.58.5.343-a VO 58 IS 5 A1 Morrison, G D YR 1982 UL http://sti.bmj.com/content/58/5/343.2.abstract AB