An International, Multi-Center Study Evaluating the Correlation of IL28B Genotypes With Patient Demographics and Disease Characteristics in Patients With Chronic Hepatitis C

This multicenter study will evaluate the correlation of interleukin 28B (IL28B) genotypes with disease characteristics and demographics in treatment-naïve and treatment-experienced chronic hepatitis C patients, including patients with HIV co-infection. There will be a single study visit for testing.