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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 800.575.912.250.859.937.311.500 Ribes B01.650.940.800.575.912.250.859. ... Blood Preservation E02.792.833.230.500 Blood Safety E02.792.833.660 Organ Preservation E02.792. ...
  2. pdfNLM Technical Bulletin, no.249-257 
    https://www.nlm.nih.gov/.../nlmarchives/techbull/249-257-1990.pdf
    ... to NLM by the National Institute for Occupational Safety and Health (NIOSH). Originally, TOXLINE received from NIOSH ... research, the quality of medical education, and the safety and effectiveness of health care institutions. The results ...