No abstract available
MeSH terms
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Endoscopy, Digestive System
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Esophageal Diseases / chemically induced*
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Esophageal Diseases / pathology*
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Esophagus / pathology
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Gastroparesis / complications*
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Histocytochemistry
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Humans
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Male
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Microscopy
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Middle Aged
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Polystyrenes / toxicity*
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Ulcer / chemically induced*
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Ulcer / pathology*
Substances
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Polystyrenes
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polystyrene sulfonic acid