RT Journal Article SR Electronic T1 Persistent urethritis associated with staghorn calculus of the kidney. JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 250 OP 251 DO 10.1136/sti.45.3.250 VO 45 IS 3 A1 R D Catterall YR 1969 UL http://sti.bmj.com/content/45/3/250.abstract AB