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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 135.812 Mirizzi Syndrome C06.130.120.200 Cholangitis C06.130.120.200.110 Cholangitis, Sclerosing C06.130.120.250 Common Bile Duct ...
  2. pdfNLM Technical Bulletin, no.117-128 
    https://www.nlm.nih.gov/.../nlmarchives/techbull/117-128-1979.pdf
    ... BILE DUCT DISEASES C6 130 120 mflamm dis = CHOLANGITIS, calculi = CHOLELITHIASIS (IM) + BILE DUCT DISEASES (NIM) or ... the penapical tissue Use for general, unspecified, or acute nonsuppurative inflammation Chronic nonsuppurative inflammation is PERIAPICAL GRANULOMA ...