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Power KM, Sanchez-Galan JE, Luskey GW, Koski KG, Burns DH.Power KM, et al. Among authors: koski kg.J Pregnancy. 2011;2011:980985. doi: 10.1155/2011/980985. Epub 2011 Sep 13.J Pregnancy. 2011.PMID: 21922046Free PMC article.