Sentence: Patients who had failed only one prior chemotherapy regimen and had Eastern Cooperative Oncology Group ( ECOG ) Performance Status ( PS ) ≤2 were randomised to either : pemetrexed 500 mg/m(2 ) on day 1 plus erlotinib 150 mg daily on days 2 - 14 ; erlotinib 150 mg daily ; or pemetrexed 500 mg/m(2 ) on day 1 of a 21-day cycle until discontinuation criteria were met .
Drug combination annotation:
[{'class': 'POS', 'spans': ['pemetrexed', 'erlotinib'], 'is_context_needed': True}]