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6%, 4.4% at 20cm, 15cm, 10cm, and 5cm above the GEJ, respectively. The common symptoms at presentation were dysphagia (47%), heartburn (44%), chest pain (24.6%) and regurgitation (18%). The mean lower esophageal sphincter (LES) pressure was 24±13.9mmHg whereas the mean contraction amplitude was 84±46.6mmHg. In patients with abnormal esophageal clearance, the most likely levels of impaired bolus transit are 15 and 20cm above the GEJ. These levels of the esophagus should be a focus of attention in future studies evaluating the pathophysio