Sentence: Growth inhibition and apoptosis were significantly ( P < 0.05 ) higher in BxPC-3 , HPAC , and PANC-1 cells treated with celecoxib and erlotinib than cells treated with either celecoxib or erlotinib .
Drug combination annotation:
[{'class': 'POS', 'spans': ['celecoxib', 'erlotinib'], 'is_context_needed': False}]