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Bird CM, Vargha-Khadem F, Burgess N.Bird CM, et al.Neuropsychologia. 2008 Mar 7;46(4):1050-9. doi: 10.1016/j.neuropsychologia.2007.11.007. Epub 2007 Nov 19.Neuropsychologia. 2008.PMID: 18155255