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  1. pdf2017MeshTreesWithChangesShown.pdf 
    https://www.nlm.nih.gov/.../2017MeshTreesWithChangesShown.pdf
    ... States National Aeronautics and Space United States Occupational Safety and ... Policy Fiscal Policy Smoke-Free Policy Social Control ...
  2. pdf2016MeshTree.pdf 
    https://www.nlm.nih.gov/mesh/2016/download/2016MeshTree.pdf
    ... 650.940.800.575.100.583.670.270...........................................Euphrasia B01.650.940.800.575.100.583.670. ... Drug Recalls I01.880.604.605.250.812...........................................Safety-Based Drug Withdrawals I01.880.604.622...........................................Mandatory ...
  3. pdf2018MeShTreeHierarchy.pdf 
    https://www.nlm.nih.gov/mesh/2018/download/2018MeShTreeHierarchy.pdf
    ... Drug Recalls I01.880.604.605.250.812...........................................Safety-Based Drug Withdrawals I01.880.604.622...........................................Mandatory ...