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APA Citation
Chen, J. W., Savarino, E., Smout, A., Xiao, Y., de Bortoli, N., Yadlapati, R., & Cock, C. (2021). chicago Classification Update (v4.0): Technical review on diagnostic criteria for hypercontractile esophagus. Neurogastroenterology & motility, 33(6), n/a. http://access.bl.uk/ark:/81055/vdc_100131037688.0x00002a