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. 2011 Jan 7;6(1):e16087. doi: 10.1371/journal.pone.0016087

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Graham et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Phylogenetic trees were inferred using the neighbour-joining distance method, with genetic distances calculated by maximum likelihood using Kimura's two-parameter model (K2P) in MEGA 4.0. The resultant consensus tree was generated using the Summarization of Split Support on Phylogenetic Trees (SumTrees) program ver. 1.02. Lineages are colour-coded according to the region of virus collection.