Reply to Johanna Noel, Olivier Huillard, and Francois Goldwasser's Letter to the Editor re: Keiichiro Mori, Mohammad Abufaraj, Hadi Mostafaei, et al. The Predictive Value of Programmed Death Ligand 1 in Patients with Metastatic Renal Cell Carcinoma Treated with Immune-checkpoint Inhibitors: A Systematic Review and Meta-analysis. Eur Urol. In press. https://doi.org/10.1016/j.eururo.2020.10.006. Clinical Activity of Immune Checkpoint Inhibitors: Is the Host the Answer?