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A patient complains of loss of appetite, weight loss, weakness, and abdominal pa...
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A patient complains of loss of appetite, weight loss, weakness, and abdominal pain. Laboratory blood test shows the following: Hb – 90 g/l; erythrocytes – 2.0•10¹²/l; color index – 1.4. B₁₂ deficiency anemia has been diagnosed. What substance is deficient in this patient, causing the anemia?
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