Mjaess, Georges, et al. “Prognostic Role of Neutrophil-to-Lymphocyte Ratio (NLR) in Urological Tumors: An Umbrella Review of Evidence from Systematic Reviews and Meta-Analyses”. Acta Oncologica, vol. 60, no. 6, June 2021, pp. 704-13, doi:10.1080/0284186X.2021.1886323.