The supernatants from each of the wells of the cell culture experiments were collected and transferred into a 96-well plate using Biolegend LEGENDplex Human CD8/NK Panel (13-plex, Catalog#740267) according to the manufacturer’s instructions. Samples were run in BD LSRFortessa Flow cytometer and results were acquired using Legendplex v8.0 software (Biolegend, San Diego, CA, USA) [24 (link)].