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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 650.940.800.575.912.250.776.500 Nymphaea B01.650.940.800.575.912.250.778 ... Central American M01.686.508.150.600 Indians, North American M01.686.508.150.625 ... European Continental Ancestry Group M01.686.508.600 Oceanic Ancestry Group M01. ...