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Undetected vitamin B12 deficiency due to false normal assay ...ncbi.nlm.nih.gov articles PMC3827408 by E Scarpa 2013 Cited by 25 Although measurement of vitamin B12 levels is the gold standard for the diagnosis of B12 deficiency some reports do exist concerning difficulties in its assay
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Side effects like reactions at the injection site are common
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No spreadsheets, no mental arithmetic at the bench, no second-guessing whether 0.025 mL is 2.5 units or 25 units
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