No abstract available
MeSH terms
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Adult
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Age Factors
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Bias
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Electric Impedance*
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Electrodes
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Equipment Design
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Esophagoscopy / methods*
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Esophagoscopy / standards
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Esophagus / physiopathology*
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Gastric Acidity Determination
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Gastroesophageal Reflux / diagnosis*
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Gastroesophageal Reflux / physiopathology*
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Humans
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Hydrogen-Ion Concentration
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Infant
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Reproducibility of Results