Sentence: A 70-year-old Asian man was diagnosed with PVT two months after initiating 5-fluorouracil/leucovorin , irinotecan , and bevacizumab therapy for rectal cancer with liver metastases .
Drug combination annotation:
[{'class': 'COMB', 'spans': ['5-fluorouracil/leucovorin', 'irinotecan', 'bevacizumab'], 'is_context_needed': True}]