The lower esophageal ring: the most common cause of dysphagia?
D000328:Adult; D003680:Deglutition Disorders / Q000209:etiology*; D004940:Esophageal Stenosis / Q000150:complications* / Q000000981:diagnostic imaging; D006548:Hernia, Diaphragmatic / Q000150:complications; D006801:Humans; D008297:Male; D011859:Radiography