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Twu JS, Lee CH, Lin PM, Schloemer RH.Twu JS, et al. Among authors: schloemer rh.Proc Natl Acad Sci U S A. 1988 Jan;85(1):252-6. doi: 10.1073/pnas.85.1.252.Proc Natl Acad Sci U S A. 1988.PMID: 2829171Free PMC article.