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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... A18.024.500 Fruit A18.024.500.500 Nuts A18.024.500.750 Seeds A18.024.500. ... 500 Milk Hypersensitivity C20.543.480.370.572 Nut and Peanut Hypersensitivity C20.543.480.370.572. ...