The variables included in the TW8 model were age, race, METAVIR score, steatosis score, statin use, platelets, ALT to ULN ratio, IL28 genotype, and previous treatment experience and the variables included in the SVR model were race, steatosis score, statin use, ribavirin, platelets, IL28 genotype, and HCV G1 subtype. The gene discussed is GPT; the disease is steatosis.