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Hirsch JE.Hirsch JE.Proc Natl Acad Sci U S A. 2005 Nov 15;102(46):16569-72. doi: 10.1073/pnas.0507655102. Epub 2005 Nov 7.Proc Natl Acad Sci U S A. 2005.PMID: 16275915Free PMC article.
Hirsch JE.Hirsch JE.Proc Natl Acad Sci U S A. 2007 Dec 4;104(49):19193-8. doi: 10.1073/pnas.0707962104. Epub 2007 Nov 26.Proc Natl Acad Sci U S A. 2007.PMID: 18040045Free PMC article.