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National Library of Medicine Classification updated, April 6, 2006

The online National Library of Medicine Classification, available at, was issued in a newly revised edition on April 6, 2006.

Fifteen new class numbers were added to the schedules and ninety-eight MeSH terms were added to the index, including fifty-seven new to the MeSH vocabulary as of 2006; in addition, seventy-five schedule records and over four hundred fifty index entries were updated since the 2005 revised edition was published on April 26, 2005.

Contact NLM for further information, questions, or comments.