[Diagnosis and treatment of chronic gastritis].
D000328:Adult; D000368:Aged; D002908:Chronic Disease; D005753:Gastric Mucosa / Q000473:pathology; D005756:Gastritis / Q000150:complications / Q000175:diagnosis / Q000628:therapy*; D005773:Gastroscopy; D006801:Humans; D008875:Middle Aged; D013274:Stomach Neoplasms / Q000209:etiology