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Singh AN, Matson JL, Mouttapa M, Pella RD, Hill BD, Thorson R.Singh AN, et al. Among authors: pella rd.Res Dev Disabil. 2009 Jul-Aug;30(4):782-92. doi: 10.1016/j.ridd.2008.11.001. Epub 2008 Dec 9.Res Dev Disabil. 2009.PMID: 19081226
Singh AN, Matson JL, Hill BD, Pella RD, Cooper CL, Adkins AD.Singh AN, et al. Among authors: pella rd.Res Dev Disabil. 2010 Nov-Dec;31(6):1135-41. doi: 10.1016/j.ridd.2010.07.003. Epub 2010 Aug 8.Res Dev Disabil. 2010.PMID: 20692809Review.