CDX2 and chronic atrophic gastritis: h. pylori (748), spem (706), gastric (683), intestinal metaplasia (407), epithelial-cells (272), stem cells (251), oxyntic atrophy (208), chief cells (202), parietal-cells (169), atrophic gastritis (114), acid-secretion (93), infection (84), zymogenic cells (79), cdx2 (63), sonic hedgehog (62), nf-kappa-b (59)