title: After gastrectomy.
mesh_terms: D000747:Anemia, Hypochromic / Q000209:etiology; D006801:Humans; D008286:Malabsorption Syndromes / Q000150:complications; D011178:Postgastrectomy Syndromes / Q000150:complications; D014806:Vitamin B 12 Deficiency / Q000209:etiology