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Curtis KM, Chrisman CE, Peterson HB; WHO Programme for Mapping Best Practices in Reproductive Health.Curtis KM, et al.Obstet Gynecol. 2002 Jun;99(6):1100-12. doi: 10.1016/s0029-7844(02)01984-1.Obstet Gynecol. 2002.PMID: 12052606Review.
Curtis KM, Mohllajee AP, Peterson HB.Curtis KM, et al.Contraception. 2006 Feb;73(2):189-94. doi: 10.1016/j.contraception.2005.08.009. Epub 2005 Oct 21.Contraception. 2006.PMID: 16413849Review.