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. 2014 Mar 14;5(4):253–257. doi: 10.1007/s13238-014-0036-1

Figure 2.

Figure 2

Phylogenetic trees of PB1 gene of H5, H6, H7, and H10 subtypes of influenza viruses as examples for the other genes and other subtypes. H9N2 viruses are in green and human infections are in magenta