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Chown SL.Chown SL.Philos Trans R Soc Lond B Biol Sci. 2012 Jun 19;367(1596):1615-27. doi: 10.1098/rstb.2011.0422.Philos Trans R Soc Lond B Biol Sci. 2012.PMID: 22566671Free PMC article.Review.