The goal of this study is to determine which position, maneuvers or combination thereof generates the highest pressure at the EGJ as assessed by high-resolution esophageal manometry and thus greater or more robust contraction of the diaphragm.
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Pressure at the esophagogastric junction
Timeframe: Measured for each participant during high-resolution esophageal manometry. Data will be collected over the enrollment period of one year.