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Kindzelskii AL, Petty HR.Kindzelskii AL, et al.Proc Natl Acad Sci U S A. 2002 Jul 9;99(14):9207-12. doi: 10.1073/pnas.132630999. Epub 2002 Jun 24.Proc Natl Acad Sci U S A. 2002.PMID: 12082178Free PMC article.Retracted.