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Vander Zanden MJ.Vander Zanden MJ.Proc Natl Acad Sci U S A. 2005 May 17;102(20):7055-6. doi: 10.1073/pnas.0502549102. Epub 2005 May 10.Proc Natl Acad Sci U S A. 2005.PMID: 15886283Free PMC article.No abstract available.