Contraceptive use in women enrolled into preventive HIV vaccine trials: experience from a phase I/II trial in East Africa.
Kibuuka H, Guwatudde D, Kimutai R, Maganga L, Maboko L, Watyema C, Sawe F, Shaffer D, Matsiko D, Millard M, et al. PLoS One. 2009; 4(4):e5164. Epub 2009 Apr 10.