Sentence: Combination treatment with cetuximab and nystatin selectively increased cetuximab uptake by tumor tissues , translating into potentiated antitumor efficacy of cetuximab in vivo ( A431 and A549 tumors ) .
Drug combination annotation:
[{'class': 'POS', 'spans': ['cetuximab', 'nystatin'], 'is_context_needed': False}]