RT Journal Article SR Electronic T1 Venus JF BMJ Sexual & Reproductive Health JO BMJ Sex Reprod Health FD British Medical Journal Publishing Group SP 152 OP 152 DO 10.1136/bmjsrh-2017-101931 VO 44 IS 2 YR 2018 UL http://jfprhc.bmj.com/content/44/2/152.abstract AB