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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 483.480 HTLV-II Infections C20.673.600 Leukocyte-Adhesion Deficiency Syndrome C20.673.627 Lymphopenia C20.673.627. ...
  2. pdfNLM Technical Bulletin, no.249-257 
    https://www.nlm.nih.gov/.../nlmarchives/techbull/249-257-1990.pdf
    ... RAS) ONCOGENE PROTEIN PP60(SRC) RECEPTORS, CYTOADHESIN RECEPTORS, LEUKOCYTE-ADHESION RECEPTORS, VERY ... BX (BackwardCross Reference) and TH (Thesaurus ID) The Thesaurus (TH) data ...