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Wambaugh JL, Kalinyak-Fliszar MM, West JE, Doyle PJ.Wambaugh JL, et al.J Speech Lang Hear Res. 1998 Aug;41(4):725-43. doi: 10.1044/jslhr.4104.725.J Speech Lang Hear Res. 1998.PMID: 9712122