No abstract available
MeSH terms
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Chromium Radioisotopes
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False Negative Reactions
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False Positive Reactions
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Humans
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Intestinal Absorption
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Iron Radioisotopes
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Melena / diagnosis
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Methods
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Occult Blood*
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Peroxidases
Substances
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Chromium Radioisotopes
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Iron Radioisotopes
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Peroxidases