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The immunohistochemical intensity analysis among proton pump inhibitor (PPI)-refractory gastroesophageal reflux disease (GERD), eosinophilic esophagitis (EoE), and healthy control individuals. White, gray, and black columns show the ratios of weak, middle, and strong intensity for each tight junction protein.
NS, not significant; ZO-1, zonula occludin-1. *Chi-square test.
