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. 2017 Sep 14;4(1):e000169. doi: 10.1136/bmjgast-2017-000169

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HRM findings in the two groups (those with delayed GE (blue bars) and those with normal GE (orange bars)), using the Chicago classification (v.3) (see the Patients and methods section). Both groups exhibited a high prevalence of oesophageal motility abnormalities, such as EGJOO, achalasia, DES and IEM. DES, diffuse oesophageal spasm; EGJOO, esophago-gastric junction outflow obstruction; GE, gastric emptying; IEM, ineffective oesophageal motility.