References
Chen HW, Du M (2016) Minimally invasive surgery for esophageal achalasia. J Thorac Dis 8(7):1834–1836
Pandolfino JE, Gawron AJ (2015) Achalasia: a systematic review. JAMA 313(18):1841–1852
Goldblum JR, Whyte RI, Orringer MB, Appelman HD (1994) Achalasia: a morphologic study of 42 resected specimens. Am J Surg Pathol 18(4):327–337
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Amiraian, D.E., DiSantis, D.J. The esophageal bird’s beak sign. Abdom Radiol 42, 1608–1609 (2017). https://doi.org/10.1007/s00261-016-1028-9
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DOI: https://doi.org/10.1007/s00261-016-1028-9