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Stevens RL, Friend DS, McNeil HP, Schiller V, Ghildyal N, Austen KF.Stevens RL, et al. Among authors: friend ds.Proc Natl Acad Sci U S A. 1994 Jan 4;91(1):128-32. doi: 10.1073/pnas.91.1.128.Proc Natl Acad Sci U S A. 1994.PMID: 8278352Free PMC article.