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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 329.937 Hypotrichosis C17.800.329.937.122 Alopecia C17.800.329.937.122.147 Alopecia Areata C17.800.329.937.122.348 Loose ... C23.300.017 Airway Remodeling C23.300.035 Alopecia C23.300.035.500 Loose Anagen Hair Syndrome ...