title: Vitamin B 12 absorption tests. Their unreliability in postgastrectomy states.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000428:Alcohol Drinking; D004381:Duodenal Ulcer / Q000601:surgery; D004912:Erythrocytes / Q000378:metabolism; D005500:Follow-Up Studies; D005743:Gastrectomy / Q000009:adverse effects*; D005750:Gastric Juice / Q000378:metabolism; D006801:Humans; D007437:Intrinsic Factor / Q000378:metabolism; D007889:Leiomyoma / Q000601:surgery; D008722:Methods; D008875:Middle Aged; D010434:Pepsin A / Q000378:metabolism; D011183:Postoperative Complications; D012546:Schilling Test; D013274:Stomach Neoplasms / Q000601:surgery; D013276:Stomach Ulcer / Q000601:surgery; D013997:Time Factors; D014805:Vitamin B 12 / Q000097:blood / Q000378:metabolism*; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis* / Q000209:etiology*
chemical_list: D007437:Intrinsic Factor; D010434:Pepsin A; D014805:Vitamin B 12