A Study of Hepatitis C Virus
['A Study of Hepatitis C Virus', 'Puerto Rico', 'Canada', 'A Randomized, Double-blinded Study to Evaluate the Safety and Effect on Sustained Virological Response of HCV Polymerase Inhibitor Pro-drug in Combination With PEGASYS Plus Copegus, Compared With the Currently Approved Combination of PEGASYS Plus Copegus, in Treatment-naïve Patients With Chronic he', 65, 'clinical trial']