Ribavirin at the Era of Novel Direct Antiviral Agents for the Treatment of Hepatitis C Virus Infection: Relevance of Pharmacological Monitoring

Figure 2

Ribavirin concentration in plasma and in whole blood of 57 patients treated by pegylated interferon/ribavirin (correlation coefficient: 0.841, 2 = 0.71, 95% confidence interval 0.743–0.904).