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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 708 Tongue, Fissured C07.465.910.791 Tongue, Hairy C07.465.943 Tuberculosis, Oral C07.550 Pharyngeal Diseases C07.550.174 Lemierre Syndrome C07.550.350 Nasopharyngeal Diseases C07.550.350. ...
  2. pdf2018NewHeadingsSingleColumn508.pdf 
    https://www.nlm.nih.gov/.../2018NewHeadingsSingleColumn508.pdf
    ... branches encircle the TRACHEA and ESOPHAGUS. Signs and symptoms include DYSPNEA; RESPIRATORY SOUNDS, ... Tree locations: Aortic Arch Syndromes C14.907.109. ...