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Glover MM, McKenna DS, Downing CM, Smith DB, Croom CS, Sonek JD.Glover MM, et al. Among authors: croom cs.Am J Perinatol. 2011 May;28(5):377-81. doi: 10.1055/s-0031-1274509. Epub 2011 Mar 4.Am J Perinatol. 2011.PMID: 21380990Clinical Trial.