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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 549.336.505 Labial Frenum A14.549.441 Mouth Floor A14.549.512 Mouth Mucosa A14.549.617 ... Acinar Cell C04.557.470.200.025.220 Carcinoma, Adenoid Cystic C04.557.470.200.025.232 Carcinoma, Ductal ...