1. Clinical Practice Guidelines for the assessment of uninvestigated esophageal dysphagia;Liu;J Can Assoc Gastroenterol,2018
2. World gastroenterology organization global guidelines: dysphagia—global guidelines and cascades update September 2014;Malagelada;J Clin Gastroenterol,2015
3. Sleisenger and Fordtran’s Gastrointestinal and Liver Disease, 11th Edition, Elsevier, 2021. Chapter 13: Symptoms of esophageal disease.