RT Journal Article SR Electronic T1 Trichomonas vaginalis. II. Laboratory investigations in trichomoniasis. JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 531 OP 535 DO 10.1136/sti.49.6.531 VO 49 IS 6 A1 R Nielsen YR 1973 UL http://sti.bmj.com/content/49/6/531.abstract AB