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The NLM Classification is updated annually and users of this information are encouraged to obtain the most current data. The new versions are generally available by April of the edition year.
The data are available to all requesters, both within and outside the United States. There is no charge for obtaining the data.
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These terms and conditions are in effect as long as the user retains any of the data obtained from this site.
NOTE: 2009 Classification data will not be available in PDF or HTML formats until May 15, 2009.
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- Section 3: Index [2 MB]
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Last updated: 23 April 2009
First published: 08 October 2002
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