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Hsu H, Yu YM, Babich JW, Burke JF, Livni E, Tompkins RG, Young VR, Alpert NM, Fischman AJ.Hsu H, et al. Among authors: yu ym.Proc Natl Acad Sci U S A. 1996 Mar 5;93(5):1841-6. doi: 10.1073/pnas.93.5.1841.Proc Natl Acad Sci U S A. 1996.PMID: 8700846Free PMC article.