article_metadata: Jason Abdallah Ronnie Fass
article_metadata: 10.5056/jnm15162
article_metadata: J Neurogastroenterol Motil
article_metadata: 2016 Jan 31;22(1):153-6.
article_metadata: esophageal achalasia esophageal motility disorders esophagus manometry
article_metadata: CC BY-NC
article_metadata: https://pubmed.ncbi.nlm.nih.gov/26717932/
article_metadata: PMC4699733
article_metadata: 26717932
article_metadata: Progression of Jackhammer Esophagus to Type II Achalasia
article_metadata: 2016