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  1. Esophagus Disorders (National Library of Medicine)  
    The esophagus is the muscular tube that carries food and liquids from your mouth to the stomach. You may not be aware of your esophagus until you swallow ...
    https://medlineplus.gov/esophagusdisorders.html - Health Topics
  2. Congenital Heart Defects (National Library of Medicine)  
    ... catheterization to repair simple defects, such as a small hole in the inside wall of the heart. ...
    https://medlineplus.gov/congenitalheartdefects.html - Health Topics