No abstract available
MeSH terms
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Cation Exchange Resins / adverse effects*
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Esophageal Diseases / chemically induced*
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Esophageal Diseases / diagnosis
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Esophageal Diseases / pathology
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Esophagoscopy
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Humans
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Male
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Middle Aged
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Polystyrenes / adverse effects*
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Ulcer / chemically induced*
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Ulcer / diagnosis
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Ulcer / pathology
Substances
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Cation Exchange Resins
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Polystyrenes
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polystyrene sulfonic acid