RT Journal Article SR Electronic T1 Reduced Effectiveness of Contraceptive Implants for Women Taking the Antiretroviral Efavirenz (EFV): Still Good Enough and for How Long? JF Global Health: Science and Practice JO GLOB HEALTH SCI PRACT FD Johns Hopkins University- Global Health. Bloomberg School of Public Health, Center for Communication Programs SP 528 OP 531 DO 10.9745/GHSP-D-15-00356 VO 3 IS 4 A1 James D Shelton YR 2015 UL http://www.ghspjournal.org/content/3/4/528.abstract AB