Like their counterparts, isolated NK‐CD133+ cells expressed stem‐cell markers (Figure S3E,F) and responded to TNFR2 by the induction of pSTAT3Ser727 (Figure S4A‐D) and its colocalization with TNFR2 but the percentage of immunoreactive cells was significantly less (~8% vs ~70% in ccRCC‐CD133+CSCs) (Figure 4E, quantified in 4F). The gene discussed is PROM1; the disease is nonpapillary renal cell carcinoma.