PMC:1564426 / 60637-60765 JSONTXT

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{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/1564426","sourcedb":"PMC","sourceid":"1564426","source_url":"http://www.ncbi.nlm.nih.gov/pmc/1564426","text":"A previous version of this article appeared as an Early Online Release on July 28, 2006 (DOI: 10.1371/journal.pgen.0020146.eor).","tracks":[]}