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Carter RM, Symons Downs D, Bascom R, Dyer AM, Weisman CS.Carter RM, et al. Among authors: symons downs d.Matern Child Health J. 2012 Feb;16(2):448-55. doi: 10.1007/s10995-011-0749-1.Matern Child Health J. 2012.PMID: 21400202