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Roberts R, Timchenko NA, Miller JW, Reddy S, Caskey CT, Swanson MS, Timchenko LT.Roberts R, et al. Among authors: swanson ms.Proc Natl Acad Sci U S A. 1997 Nov 25;94(24):13221-6. doi: 10.1073/pnas.94.24.13221.Proc Natl Acad Sci U S A. 1997.PMID: 9371827Free PMC article.