[Chronic gastritis].
D000328:Adult; D000368:Aged; D000375:Aging; D000818:Animals; D002908:Chronic Disease; D005260:Female; D005753:Gastric Mucosa / Q000473:pathology; D005756:Gastritis / Q000175:diagnosis*; D005757:Gastritis, Atrophic / Q000139:chemically induced / Q000175:diagnosis; D005773:Gastroscopy; D006801:Humans; D008679:Metaplasia / Q000473:pathology; D008875:Middle Aged; D051381:Rats; D014463:Ultrasonography