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 A03 Digestive System D004064 +
  A03.159 Biliary Tract D001659 +
   A03.159.183 Bile Ducts D001652 +
    A03.159.183.079 Bile Ducts, Extrahepatic D017734 +
     A03.159.183.079.300 Common Bile Duct D003135 +
      A03.159.183.079.300.950 Ampulla of Vater D014670 +
        A03.159.183.079.300.950.600 Sphincter of Oddi D009803 

 A03 Digestive System D004064 +
  A03.556 Gastrointestinal Tract D041981 +
   A03.556.124 Intestines D007422 +
    A03.556.124.684 Intestine, Small D007421 +
     A03.556.124.684.124 Duodenum D004386 +
      A03.556.124.684.124.236 Ampulla of Vater D014670 +
        A03.556.124.684.124.236.572 Sphincter of Oddi D009803 

 A03 Digestive System D004064 +
  A03.556 Gastrointestinal Tract D041981 +
   A03.556.875 Upper Gastrointestinal Tract D041742 +
    A03.556.875.249 Duodenum D004386 +
     A03.556.875.249.160 Ampulla of Vater D014670 +
       A03.556.875.249.160.572 Sphincter of Oddi D009803