Our data showed that effective RTN4IP1 depletion in PDX tumors resulted in significant inhibition of tumor growth (Figure 8E,F; Figure S8A,B, Supporting Information), along with a significant decrease of Ki67‐positive malignant cells in RTN4IP1‐knockdown tumors (Figure 8G; Figure S8C, Supporting Information). This evidence concerns the gene MKI67 and neoplasm.