title: [History of research on idiopathic esophagus dilatation].
mesh_terms: D001938:Brazil; D004931:Esophageal Achalasia / Q000209:etiology / Q000266:history* / Q000503:physiopathology / Q000628:therapy; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007564:Japan; D012106:Research / Q000266:history