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Genomic-length maximum-likelihood phylogeny of HBV genotype I sequences. Well-defined clades have been highlighted with coloured dotted lines and reference sequences for each clade indicated (red dots). The proposed reference strain for the genotype, AB562463, is highlighted with a blue dot. Bootstrap support for branches ≥70 after 1000 replicates is indicated. The scale bar indicates the estimated nucleotide substitutions per site.
