Gastritis and gastric biopsy.
D000752:Anemia, Pernicious / Q000150:complications / Q000175:diagnosis; D001706:Biopsy / Q000379:methods*; D002908:Chronic Disease; D005750:Gastric Juice / Q000032:analysis; D005753:Gastric Mucosa / Q000473:pathology; D005756:Gastritis / Q000150:complications / Q000175:diagnosis / Q000473:pathology*; D005773:Gastroscopy; D006801:Humans