Correction to: Influence of Acid Swallows on the Dynamics of the Upper Esophageal Sphincter.

The article "Influence of Acid Swallows on the Dynamics of the Upper Esophageal Sphincter", written by "Simone Miller, Martin Ptok, Michael Jungheim", was originally published electronically on the publisher's internet portal on 4 September 2020 without open access. With the author(s)' decision to opt for Open Choice the copyright of the article changed on 30 October 2020 to © The Author(s) 2020 and the article is forthwith distributed under a Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ ), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.