RT Journal Article SR Electronic T1 Anal smear test to diagnose occult anorectal infection with human papillomavirus in men. JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 205 DO 10.1136/sti.60.3.205 VO 60 IS 3 A1 G Medley YR 1984 UL http://sti.bmj.com/content/60/3/205.1.abstract AB