A Randomized, Phase 3, Open-Label Study of Combinations of REGN2810 (ANTI-PD-1 Antibody), Ipilimumab (ANTI-CTLA-4 Antibody), and Platinum-Based Doublet Chemotherapy in First-Line Treatment of Patients with Advanced or Metastatic Non-Small Cell Lung Cancer with Tumors Expressing PD-L1