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PubMed Central® (PMC)

A portion of the Free Full Text articles reside in PubMed Central (PMC). PMC is the National Library of Medicine free digital archive of life sciences journal literature. [Show Me]

The full-text in PubMed Central can be viewed as HTML or PDF.

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Last reviewed: 3 April 2013
Last updated: 15 February 2013
First published: 20 March 2001
Metadata| Permanence level: Permanent: Dynamic Content