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Schein M, Yang Z, Mitchell-Olds T, Schmid KJ.Schein M, et al. Among authors: schmid kj.Mol Biol Evol. 2004 Apr;21(4):659-69. doi: 10.1093/molbev/msh059. Epub 2004 Jan 22.Mol Biol Evol. 2004.PMID: 14739246