No abstract available
MeSH terms
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Adolescent
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Anemia, Pernicious / complications
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Anemia, Pernicious / congenital*
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Anemia, Pernicious / metabolism
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Gastric Acid / metabolism
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Gastric Mucosa / metabolism
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Gastritis / metabolism*
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Gastritis, Atrophic / etiology
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Gastritis, Atrophic / metabolism*
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Humans
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Intestinal Absorption*
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Male
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Vitamin B 12 / metabolism*