c 2017 The Korean Society of Neurogastroenterology and Motility J Neurogastroenterol Motil, Vol. 23 No. 4 October, 2017 www.jnmjournal.org TO THE EDITOR: We read with interest the article entitled “Is Gastroesophageal Reflux Disease and Achalasia Coincident or Not” published in January 2017, by Jung and Park. The title raises a very interesting question, however, in the end, the question remain...