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The authors of this letter, Roberto O. Dantas and Rachel A. Cassiani declared no potential conflicts of interest with respect to the authorship or publication of this letter.
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Dantas, R.O., Cassiani, R.A. Upper Esophageal Sphincter Dysfunction in Gastroesophageal Reflux Disease. Dysphagia 34, 942–943 (2019). https://doi.org/10.1007/s00455-019-09988-7
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DOI: https://doi.org/10.1007/s00455-019-09988-7