[Etiological relationship between Chagas' disease and megaesophagus].
D014355:Chagas Disease / Q000150:complications*; D004194:Disease; D004931:Esophageal Achalasia; D004935:Esophageal Diseases; D004947:Esophagus; D006801:Humans; D014352:Trypanosomiasis; D014481:United States
ESOPHAGUS/diseases; TRYPANOSOMIASIS, SOUTH AMERICAN/complications