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Phylogeny of genotype A/B/C/D of HBV. A: Genotype A (upper left); B: Genotype B (upper right); C: Genotype C (lower left); D: Genotype D (lower right). The values of Bayesian posterior probability are shown orderly at the nodes. Nodes of PP > 0.95, which considered as a robust monophyletic group were shown in filled circles. Subgenotype names were shown after the tree while old classification with grey alphabets and new classification with colorful alphabets.
