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Phylogenetic trees of the surface gene in hepatitis B virus (HBV) strains isolated from 11 children in East Java, Indonesia, and 18 reference strains. Numbers in the tree indicate bootstrap reliability. Lengths of horizontal bars indicate number of nucleotide substitutions per site. Isolates from the database are indicated by their accession number, and relevant country names have been added to each HBV/B, HBV/C, and HBV/D strain.
