Sentence: Bevacizumab with or without erlotinib as maintenance therapy in patients with metastatic colorectal cancer ( GERCOR DREAM ; OPTIMOX3 ): a randomised , open-label , phase 3 trial .
Drug combination annotation:
[{'class': 'POS', 'spans': ['Bevacizumab', 'erlotinib'], 'is_context_needed': True}]