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Inadequate secretion of intrinsic factor, resulting from lesions that destroy the gastric mucosa (ingestion of corrosives, extensive neoplasia), and a number of conditions associated with a variable degree of gastric atrophy (such as multiple sclerosis, certain endocrine disorders, iron deficiency, and subtotal gastrectomy)
How Is Anaphylaxis Diagnosed and Treated
From a public health perspective, our findings support the implementation of non-invasive vitamin B12 supplementation strategies
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