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Savolainen R, Vepsalainen K.Savolainen R, et al. Among authors: vepsalainen k.Proc Natl Acad Sci U S A. 2003 Jun 10;100(12):7169-74. doi: 10.1073/pnas.1036825100. Epub 2003 May 9.Proc Natl Acad Sci U S A. 2003.PMID: 12740442Free PMC article.