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Guinn DA, Wigton TR, James JA, Dunlop DD, Socol M, Frederiksen MC.Guinn DA, et al. Among authors: james ja.Am J Obstet Gynecol. 1994 Jun;170(6):1809-12; discussion 1812-4.Am J Obstet Gynecol. 1994.PMID: 8203442Clinical Trial.