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Haddrill PR, Charlesworth B.Haddrill PR, et al.Biol Lett. 2008 Aug 23;4(4):438-41. doi: 10.1098/rsbl.2008.0174.Biol Lett. 2008.PMID: 18505714Free PMC article.
Haddrill PR, Waldron FM, Charlesworth B.Haddrill PR, et al.Biol Lett. 2008 Dec 23;4(6):758-61. doi: 10.1098/rsbl.2008.0376.Biol Lett. 2008.PMID: 18782733Free PMC article.