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NLM Classification Updated, April 28, 2016

The online National Library of Medicine Classification, available at, has been issued in a newly revised edition as of April 28, 2016.

Summary Statistics for the 2016 NLM Classification

  • 58 class numbers added
  • 2 schedule outline headers added
  • 292 class number captions or notes modified; indentation levels changed; schedule headers revised
  • 8 class numbers canceled
  • 142 index main headings added (44 from 2016 MeSH)
  • 595 index entries modified
  • 78 index headings deleted

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