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Herskovits JS, Shpetner HS, Burgess CC, Vallee RB.Herskovits JS, et al. Among authors: vallee rb.Proc Natl Acad Sci U S A. 1993 Dec 15;90(24):11468-72. doi: 10.1073/pnas.90.24.11468.Proc Natl Acad Sci U S A. 1993.PMID: 7505438Free PMC article.