Relation of the lower esophageal ring to the esophagogastric junction.
D003679:Deglutition; D003680:Deglutition Disorders / Q000209:etiology*; D004943:Esophagogastric Junction; D004947:Esophagus / Q000002:abnormalities*; D006801:Humans
DEGLUTITION DISORDERS/etiology; ESOPHAGUS/abnormalities