“…Twelve studies [16,17,23,34,37,41,47,51,56,58–60] evaluated the cost‐effectiveness of interferon plus ribavirin in treatment‐naïve patients with CHC, and three studies [27,36,55] in interferon‐nonresponders or ‐relapsers. Twenty‐one studies [12,14,15,18,22,25,26,30,31,35,38,39,44–46,48,50,52–54,57,59] evaluated the cost‐effectiveness of peginterferon plus ribavirin. Among those, 16 studies [12,14,15,18,31,35,39,45,46,48,50,52–54,57,59] evaluated treatment‐naïve patients and five studies evaluated other populations such as interferon‐nonresponders/relapsers [22], patients with HIV–HCV coinfection [26,30], intravenous drug users (IDUs) [38] and patients with persistently normal ALT levels [25].…”