Merck announced that the pivotal Phase 3 KEYNOTE-189 trial investigating KEYTRUDA (pembrolizumab), Merck’s anti-PD-1 therapy, in combination with pemetrexed (Alimta) and cisplatin or carboplatin, for the first-line treatment of patients with metastatic non-squamous non-small cell lung cancer (NSCLC), met its dual primary endpoints of overall survival (OS) and progression-free survival (PFS). Based on an interim analysis…