RT Journal Article SR Electronic T1 Non-venereal Lesions of the Anal Region JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 15 OP 17 DO 10.1136/sti.39.1.15 VO 39 IS 1 A1 H. E. Lockhart-Mummery YR 1963 UL http://sti.bmj.com/content/39/1/15.abstract AB