No abstract available
MeSH terms
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Aged / physiology*
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Homocysteine / blood
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Humans
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Methylmalonic Acid / blood
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Vitamin B 12 / metabolism
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Vitamin B 12 / physiology*
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Vitamin B 12 Deficiency / physiopathology
Substances
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Homocysteine
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Methylmalonic Acid
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Vitamin B 12