Sentence: Phase IV study of bevacizumab in combination with infusional fluorouracil , leucovorin and irinotecan ( FOLFIRI ) in first-line metastatic colorectal cancer .
Drug combination annotation:
[{'class': 'POS', 'spans': ['bevacizumab', 'fluorouracil', 'leucovorin', 'irinotecan'], 'is_context_needed': True}]