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Brinkworth RI, Breinl RA, Kobe B.Brinkworth RI, et al.Proc Natl Acad Sci U S A. 2003 Jan 7;100(1):74-9. doi: 10.1073/pnas.0134224100. Epub 2002 Dec 26.Proc Natl Acad Sci U S A. 2003.PMID: 12502784Free PMC article.