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Black KI, Mercer CH, Kubba A, Wellings K.Black KI, et al.Contraception. 2008 Mar;77(3):181-5. doi: 10.1016/j.contraception.2007.12.001. Epub 2008 Jan 30.Contraception. 2008.PMID: 18279688
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Hussainy SY, Ghosh A, Taft A, Mazza D, Black KI, Clifford R, Gudka S, Mc Namara KP, Ryan K, Jackson JK.Hussainy SY, et al. Among authors: black ki.BMJ Open. 2015 Dec 11;5(12):e010009. doi: 10.1136/bmjopen-2015-010009.BMJ Open. 2015.PMID: 26656987Free PMC article.