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Bernard C, Wan L, Peipert JF, Madden T.Bernard C, et al. Among authors: wan l.Contraception. 2018 Sep;98(3):223-227. doi: 10.1016/j.contraception.2018.05.010. Epub 2018 May 18.Contraception. 2018.PMID: 29778586Free PMC article.Clinical Trial.
Zigler RE, Madden T, Ashby C, Wan L, McNicholas C.Zigler RE, et al. Among authors: wan l.Obstet Gynecol. 2018 Oct;132(4):888-894. doi: 10.1097/AOG.0000000000002810.Obstet Gynecol. 2018.PMID: 30130351Free PMC article.Clinical Trial.