Interleukin (IL)-2, IL-4, IL-6, IL-10, TNF-α, IFN-γ, perforin, sFASL, granzyme A, and granzyme B concentration secreted into the PBMC:SCLC co-cultures was determined from the supernatants collected at 96 h by a flow cytometry-based enzyme-linked immunosorbent assay (ELISA) array (LEGENDplexTM Human CD8/NK Panel, BioLegend). Here, PRF1 is linked to small cell lung carcinoma.