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Ward RD, Zemlak TS, Innes BH, Last PR, Hebert PD.Ward RD, et al. Among authors: hebert pd.Philos Trans R Soc Lond B Biol Sci. 2005 Oct 29;360(1462):1847-57. doi: 10.1098/rstb.2005.1716.Philos Trans R Soc Lond B Biol Sci. 2005.PMID: 16214743Free PMC article.