On 10 October 2015, the FDA further expanded its use in metastatic non-squamous NSCLC patients who progressed on first-line platinum-based chemotherapy in a similar setting; this study included patients with actionable mutations such as EGFR and ALK mutation who progressed after appropriate target therapy, per the CheckMate-057 trial, which resulted in increased survival and decreased immunotherapy-related toxicity [38] (Category 1). Here, EGFR is linked to non-small cell lung carcinoma.