Lower esophageal ring: endoscopic and therapeutic aspects.
D000328:Adult; D000368:Aged; D004106:Dilatation; D004935:Esophageal Diseases / Q000175:diagnosis / Q000628:therapy; D004943:Esophagogastric Junction; D004945:Esophagoscopy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged