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Lal AA, Patterson PS, Sacci JB, Vaughan JA, Paul C, Collins WE, Wirtz RA, Azad AF.Lal AA, et al. Among authors: patterson ps.Proc Natl Acad Sci U S A. 2001 Apr 24;98(9):5228-33. doi: 10.1073/pnas.091447398. Epub 2001 Apr 17.Proc Natl Acad Sci U S A. 2001.PMID: 11309510Free PMC article.