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Aris-Brosou S, Yang Z.Aris-Brosou S, et al. Among authors: yang z.Mol Biol Evol. 2003 Dec;20(12):1947-54. doi: 10.1093/molbev/msg226. Epub 2003 Aug 29.Mol Biol Evol. 2003.PMID: 12949122
Yang Z.Yang Z.Philos Trans R Soc Lond B Biol Sci. 2008 Dec 27;363(1512):4031-9. doi: 10.1098/rstb.2008.0164.Philos Trans R Soc Lond B Biol Sci. 2008.PMID: 18852106Free PMC article.