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Williamson SH, Hernandez R, Fledel-Alon A, Zhu L, Nielsen R, Bustamante CD.Williamson SH, et al. Among authors: bustamante cd.Proc Natl Acad Sci U S A. 2005 May 31;102(22):7882-7. doi: 10.1073/pnas.0502300102. Epub 2005 May 19.Proc Natl Acad Sci U S A. 2005.PMID: 15905331Free PMC article.