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Whiteness of crypt opening and grade of gastritis according to the updated Sydney System. Kruskal-Wallis test showed significant correlations between grades of histological inflammation (P < 0.001) and activity (P < 0.001) and whiteness of crypt openings (COs). Glandular atrophy and intestinal metaplasia were not significantly correlated with whiteness of COs. DWP: Dense white pit.
