Gilead Sciences (Nasdaq: GILD) and Arcus Biosciences (NYSE:RCUS) are touting positive results from the fourth interim analysis of the randomized, open-label Phase 2 ARC-7 study in patients with first-line metastatic non-small cell lung cancer (NSCLC) at the American Society of Clinical Oncology (ASCO). Patients in the arms who received the investigational Fc-silent anti-TIGIT monoclonal antibody…