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World J Clin Cases. Mar 16, 2023; 11(8): 1741-1752
Published online Mar 16, 2023. doi: 10.12998/wjcc.v11.i8.1741
Figure 1
Figure 1 Impaired relaxation of the lower esophageal sphincter is usually characterized by "beak" narrowing at the lower esophageal sphincter.