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Phylogenetic analysis of H5 wild bird viruses and genotypes. The Maximum Clade Credibility (MCC) tree of the HA gene was constructed by using the package BEAST (v1.8.4). The clades shown in different colours in the tree were annotated by using FigTree (v1.4.4) (a), and the origins of each gene segment are indicated by different coloured bars (b). Phylogenetic trees with complete information are provided as Supporting Figures S1 and S2.
