Sentence: Patients in arm 1 ( n = 88 ) received 4 cycles of paclitaxel and carboplatin followed by 2 to 4 cycles of gemcitabine-based combination chemotherapy .
Drug combination annotation:
[{'class': 'POS', 'spans': ['paclitaxel', 'carboplatin', 'gemcitabine-based'], 'is_context_needed': True}]