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Li XP, Muller-Moule P, Gilmore AM, Niyogi KK.Li XP, et al. Among authors: muller moule p.Proc Natl Acad Sci U S A. 2002 Nov 12;99(23):15222-7. doi: 10.1073/pnas.232447699. Epub 2002 Nov 4.Proc Natl Acad Sci U S A. 2002.PMID: 12417767Free PMC article.