Many of the highly significant DEGs had been identified in previous transcriptomic studies on differential gene expression in prion-diseased mice ( Booth et al , 2004 ; Riemer et al , 2004 ; Xiang et al , 2004 , 2007 ; Brown et al , 2005 ; Skinner et al , 2006 ; Sorensen et al , 2008 ).
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