Chronic gastritis.
D000328:Adult; D000368:Aged; D000375:Aging; D000818:Animals; D001284:Atrophy; D002908:Chronic Disease; D005260:Female; D005756:Gastritis / Q000175:diagnosis / Q000276:immunology / Q000473:pathology*; D005757:Gastritis, Atrophic / Q000139:chemically induced / Q000473:pathology; D005773:Gastroscopy; D006801:Humans; D007422:Intestines / Q000473:pathology; D008679:Metaplasia