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Horning EL, Chen BA, Meyn LA, Creinin MD.Horning EL, et al. Among authors: creinin md.Contraception. 2012 Apr;85(4):402-7. doi: 10.1016/j.contraception.2011.09.007. Epub 2011 Nov 4.Contraception. 2012.PMID: 22056100