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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... DNA, A-Form D13.444.308.135 DNA Adducts D13.444.308.148 DNA, Algal D13.444. ... G05.200 DNA Damage G05.200.104 DNA Adducts G05.200.210 DNA Breaks G05.200.210. ...