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Pilot maximum-likelihood phylogenetic tree of the A/H9 influenza virus gene sequences obtained by using the representative dataset (Appendix 3) for the G lineage provided as part of a proposed global classification and nomenclature system for A/H9 influenza viruses. Each clade is represented by >3 sequences, each labeled and colored according to the clade of belonging. Ultrafast-bootstrap supports >80% are indicated next to nodes. Scale bar indicates substitutions per site.
