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Chan SJ, Cao QP, Steiner DF.Chan SJ, et al. Among authors: steiner df.Proc Natl Acad Sci U S A. 1990 Dec;87(23):9319-23. doi: 10.1073/pnas.87.23.9319.Proc Natl Acad Sci U S A. 1990.PMID: 1701257Free PMC article.