HLA-C and nonpapillary renal cell carcinoma: The addition of native immune cells (nIC; non-characterized for the human leukocyte antigen expression) isolated from the blood of healthy donors (Supplementary Information, Figure S7A and Video S2), demonstrated an unspecific recognition of (MHC determinants of) the ccRCC, endothelial, and fibroblast cell lines by the immune cells.