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Open Access
Peer-reviewed
Research Article
Contributed equally to this work with: Alexei J Drummond, Andrew Rambaut
¤ Current address: Department of Computer Science, University of Auckland, Auckland, New Zealand
Affiliation Department of Zoology, University of Oxford, Oxford, United Kingdom
*To whom correspondence should be addressed. E-mail: andrew.rambaut@zoo.ox.ac.uk
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