Rebetol (ribavirin; SCH 18908)

PEG-Intron Plus Rebetol Treatment of Chronic Hepatitis C Subjects Who Failed Response to Alpha-Interferon Plus Ribavirin (Study P02370)

Peginterferon Dose Evaluations for Previously Untreated Subjects With Chronic Hepatitis C Infected With Genotype 1 (Study P03471)

Inhibition of Disease Progression in Hepatitis C-infected Patients With Compensated Liver Cirrhosis (P03811) (COMPLETED)

Efficacy of PegIntron and Rebetol in Previously Untreated Patients With Chronic Hepatitis C Infected With HCV Genotype 1/4/5/6 (Study P04243)

Real-life Surveillance Study of Patients With Chronic Hepatitis C Treated With PegIntron Injector and Rebetol (Study P04538)(COMPLETED)

Post-marketing Surveillance Study of Ex-intravenous Drug Abusers With Chronic Hepatitis C Treated With PegIntron Plus Rebetol (P04408/MK-4031-261)

Compliance of HCV Genotype 1 Infected Patients Receiving PegIntron/Rebetol and a Patient Assistance Program (Study P04671)

Adherence to Treatment With PegIntron Pen Plus Rebetol in Treatment-naïve Adult Patients With Hepatitis C in Romania (Study P04247)

Evaluation of Patient Satisfaction in Hepatitis C Patients Treated With PegIntron Pen and Rebetol in Romania (Study P04301)

Post-marketing Surveillance of Children With Chronic Hepatitis C Treated With Intron A (Vial or Pen) and Rebetol (Study P04397)(TERMINATED)

Evaluation of Rapid Virologic Response Among HCV Patients Treated With PegIntron and Rebetol in Brazil (Study P05427)

Safety and Efficacy of PegIntron Plus Rebetol in Patients With Chronic Hepatitis C in Japan, Excluding (1) Subjects With HCV Genotype 1 and High Viral Load, and (2) Interferon-naïve Subjects With Low Viral Load (Study P04841)(COMPLETED)

An Observational Study of Patients With Chronic Hepatitis C Undergoing Treatment With PegIntron and Rebetol in Clinical Practice in Belgium (Study P05494)(WITHDRAWN)