This retrospective study will evaluate the association of biomarkers and the treatment response of patients with chronic hepatitis B, who have completed therapy with Pegasys (peginterferon alfa-2a) ± lamivudine. For the analysis stored serum samples obtained from patients will be used; no actual patients are involved.
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Interleukin-28B (IL-28B) genotype in stored serum samples of patients with chronic hepatitis B, who have completed therapy with Pegasys +/- lamivudine
Timeframe: Samples up to 72 weeks of treatment
Single nucleotide polymorphisms (SNP) of rs12356193 in stored serum samples of patients with chronic hepatitis B, who have completed therapy with Pegasys +/- lamivudine
Timeframe: Samples up to 72 weeks of treatment