RT Journal Article SR Electronic T1 Implanon® failure and antiretroviral therapy JF Journal of Family Planning and Reproductive Health Care JO J Fam Plann Reprod Health Care FD British Medical Journal Publishing Group SP 67 OP 67 DO 10.1783/jfp.34.1.67b VO 34 IS 1 A1 Tristan J Barber A1 Laura Waters YR 2008 UL http://jfprhc.bmj.com/content/34/1/67.2.abstract AB