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Distribution of IL28B single nucleotide polymorphisms by response to combined therapy with pegylated interferon-α plus oral treatment with ribavirin, in Chilean patients with chronic hepatitis C (genotype 1). A: rs12979860 genotype; B: rs12980275 genotype; C: rs8099917 genotype. SVR: Sustained virological response (n = 50); NR: Null responders (n = 49).
