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Wei CL, Ng P, Chiu KP, Wong CH, Ang CC, Lipovich L, Liu ET, Ruan Y.Wei CL, et al.Proc Natl Acad Sci U S A. 2004 Aug 10;101(32):11701-6. doi: 10.1073/pnas.0403514101. Epub 2004 Jul 22.Proc Natl Acad Sci U S A. 2004.PMID: 15272081Free PMC article.