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London JA, Biegel D, Pachter JS.London JA, et al. Among authors: biegel d.Proc Natl Acad Sci U S A. 1996 Apr 30;93(9):4147-52. doi: 10.1073/pnas.93.9.4147.Proc Natl Acad Sci U S A. 1996.PMID: 8633031Free PMC article.