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Pravosudov VV, Smulders TV.Pravosudov VV, et al.Philos Trans R Soc Lond B Biol Sci. 2010 Mar 27;365(1542):859-67. doi: 10.1098/rstb.2009.0216.Philos Trans R Soc Lond B Biol Sci. 2010.PMID: 20156812Free PMC article.