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Page NM, Bell NJ, Gardiner SM, Manyonda IT, Brayley KJ, Strange PG, Lowry PJ.Page NM, et al.Proc Natl Acad Sci U S A. 2003 May 13;100(10):6245-50. doi: 10.1073/pnas.0931458100. Epub 2003 Apr 25.Proc Natl Acad Sci U S A. 2003.PMID: 12716968Free PMC article.