RT Journal Article SR Electronic T1 Syphilis in industry JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 33 OP 33 DO 10.1136/sti.20.1.33 VO 20 IS 1 YR 1944 UL http://sti.bmj.com/content/20/1/33.abstract AB