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Field T, Diego M, Hernandez-Reif M.Field T, et al.Infant Behav Dev. 2009 Jun;32(3):239-44. doi: 10.1016/j.infbeh.2009.03.005. Epub 2009 May 12.Infant Behav Dev. 2009.PMID: 19439359Free PMC article.Review.
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