The H-scores of HNF4α, CDX2, and KLF4 protein were 33.0 ± 7.6 vs. 122.1 ± 8.3 (P < 0.01), 17.0 ± 5.6 vs. 60.4 ± 5.9 (P < 0.01), and 58.8 ± 7.3 vs. 129.7 ± 6.5 (P < 0.01) in gastritis vs. IM tissues, respectively (Fig. 8b). The gene discussed is KLF4; the disease is gastritis.