<qa>  What is the only other therapy that has been used for HBV?- Less that 12 weeks of prior therapy with nucleosidenucleotide analogue excluding lamivudine with activity against HBV including e.g. famciclovir, tenofovir, ganciclovir, adefovir. No receipt of any of these therapies within 24 weeks prior to randomization into this study. 