To shed light on the contribution of cisplatin-resistant MYCN-amplified neuroblastoma cells in the tumour immune microenvironment, we established a murine xenograft model using the cisplatin-sensitive cell line KellyLuc and its cisplatin-resistant derivative cell line KellyCis83Luc [13], which were injected into the tail vein of mice and allowed to metastasise for 40 days before resection (Fig 1, S1 and S2 Figs). The gene discussed is MYCN; the disease is neuroblastoma.