poem medical poster

poem peroral esophagus myotomy gastroesophageal endoscopic gastric muscle procedure treatment achalasia minimally vector gastroscopy invasive disorder stomach swallow food beverage mucosa incision submucosa endoscope esophageal movement les blocked closed tunnel clips short nonsurgical sphincter fibers stricture anatomical junction digestive system gastroenterologist illustration endoscopy therapy eating acidic belching camera chest chyme