No abstract available
MeSH terms
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Aged, 80 and over
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Central Nervous System Diseases / etiology
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Dura Mater*
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Endoscopy, Gastrointestinal / adverse effects*
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Fistula / etiology*
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Frontal Sinus*
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Humans
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Male
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Paranasal Sinus Diseases / etiology
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Pneumocephalus / etiology*
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Pneumocephalus / surgery