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Oprescu F, Peek-Asa C, Wallis A, Young T, Nour D, Cherecheş RM.Oprescu F, et al.Matern Child Health J. 2012 Feb;16(2):495-500. doi: 10.1007/s10995-011-0742-8.Matern Child Health J. 2012.PMID: 21290173Free PMC article.