Sentence: This study assessed the efficacy and safety of telaprevir in combination with peginterferon-α-2b ( PEG IFN ) and ribavirin ( RBV ) , for Japanese difficult-to-treat patients with hepatitis C virus ( HCV ) genotype 2 who had not achieved sustained virological response ( SVR ) during prior treatment .
Drug combination annotation:
[{'class': 'POS', 'spans': ['telaprevir', 'peginterferon-α-2b'], 'is_context_needed': True}, {'class': 'POS', 'spans': [0, 2], 'is_context_needed': False}]