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Kernberg A, Caughey AB.Kernberg A, et al. Among authors: caughey ab.Obstet Gynecol Clin North Am. 2017 Dec;44(4):593-600. doi: 10.1016/j.ogc.2017.08.012.Obstet Gynecol Clin North Am. 2017.PMID: 29078941Review.