No abstract available
MeSH terms
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Adenocarcinoma / drug therapy*
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Adenocarcinoma / etiology
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Adenocarcinoma / pathology
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Aged
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Barrett Esophagus / complications*
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Barrett Esophagus / pathology
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Dihematoporphyrin Ether / therapeutic use*
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Esophageal Neoplasms / drug therapy*
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Esophageal Neoplasms / etiology
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Esophageal Neoplasms / pathology
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Esophagus / pathology
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Humans
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Male
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Middle Aged
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Photochemotherapy*