SOX2
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“Down-regulation of a gastric transcription factor, Sox2, and ectopic expression of intestinal homeobox genes, Cdx1 and Cdx2: inverse correlation during progression from gastric/intestinal-mixed to complete intestinal metaplasia”. Journal of Cancer Research and Clinical Oncology 130 (3): 135–45. (March 2004). doi:10.1007/s00432-003-0519-6. PMID 14655050.