Chronic atrophic gastritis.
D000328:Adult; D000752:Anemia, Pernicious / Q000150:complications / Q000382:microbiology / Q000473:pathology; D001419:Bacteria / Q000302:isolation & purification; D005756:Gastritis / Q000473:pathology*; D005757:Gastritis, Atrophic / Q000209:etiology / Q000382:microbiology / Q000473:pathology*; D005773:Gastroscopy; D006801:Humans