No abstract available
MeSH terms
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Echocardiography, Transesophageal / instrumentation
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Echocardiography, Transesophageal / methods*
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Equipment Design
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Humans
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Laryngoscopes*
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Laryngoscopy / methods*
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Thoracic Surgery, Video-Assisted / instrumentation
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Thoracic Surgery, Video-Assisted / methods*