Oropharyngeal dysphagia and operations on the upper esophageal sphincter.
D003680:Deglutition Disorders / Q000209:etiology* / Q000601:surgery; D004943:Esophagogastric Junction / Q000601:surgery*; D006801:Humans; D010608:Pharyngeal Diseases / Q000209:etiology* / Q000601:surgery