RT Journal Article SR Electronic T1 Risk of ectopic pregnancy after salpingitis. JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 409 DO 10.1136/sti.60.6.409 VO 60 IS 6 A1 Hockin, J C YR 1984 UL http://sti.bmj.com/content/60/6/409.1.abstract AB