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Keith Siau on Twitter: "Causes of Vitamin B12 deficiency @Clin_Med https://t.co/fwzy1YnVvj https://t.co/SuIU55UyQh" / Twitter
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The Influence of Diphyllobothrium latum on the Vitamin B12‐Intrinsic Factor Complex1 - Nyberg - 1960 - Acta Medica Scandinavica - Wiley Online Library
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