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Lawrence RJ, Volpe TA.Lawrence RJ, et al.Proc Natl Acad Sci U S A. 2009 Jan 27;106(4):1163-8. doi: 10.1073/pnas.0811161106. Epub 2009 Jan 21.Proc Natl Acad Sci U S A. 2009.PMID: 19164572Free PMC article.
Volpe T, Schramke V, Hamilton GL, White SA, Teng G, Martienssen RA, Allshire RC.Volpe T, et al.Chromosome Res. 2003;11(2):137-46. doi: 10.1023/a:1022815931524.Chromosome Res. 2003.PMID: 12733640
Volpe TA, Kidner C, Hall IM, Teng G, Grewal SI, Martienssen RA.Volpe TA, et al.Science. 2002 Sep 13;297(5588):1833-7. doi: 10.1126/science.1074973. Epub 2002 Aug 22.Science. 2002.PMID: 12193640