RT Journal Article SR Electronic T1 Sex and cervical cancer. JF Genitourinary Medicine JO Genitourin Med FD BMJ Publishing Group Ltd SP 81 OP 89 DO 10.1136/sti.64.2.81 VO 64 IS 2 A1 J D Oriel YR 1988 UL http://sti.bmj.com/content/64/2/81.abstract AB