RT Journal Article SR Electronic T1 Reply JF Journal of Family Planning and Reproductive Health Care JO J Fam Plann Reprod Health Care FD British Medical Journal Publishing Group SP 60 OP 60 DO 10.1136/jfprhc.2010.0027 VO 37 IS 1 A1 Michael D O'Brien A1 John Guillebaud YR 2011 UL http://jfprhc.bmj.com/content/37/1/60.2.abstract AB