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Williams JA, Romero VC, Clinton CM, Vazquez DM, Marcus SM, Chilimigras JL, Hamilton SE, Allbaugh LJ, Vahratian AM, Schrader RM, Mozurkewich EL.Williams JA, et al.BMC Pregnancy Childbirth. 2016 Aug 3;16(1):203. doi: 10.1186/s12884-016-0988-7.BMC Pregnancy Childbirth. 2016.PMID: 27485050Free PMC article.Clinical Trial.