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Neighbour-joining tree analysis of HBV sequences (1,600 nucleotides) of HBV strains infecting two donor-recipient pairs (DEN124569-D/DEN250467-R and DEN120555-D/DEN671105-R). Bootstrap values of 1,000 replicates are indicated, reference HBV sequences from GenBank are identified by accession number, HBV genotypes are indicated.
