Erratum to "European Association of Urology (EAU) Prognostic Factor Risk Groups for Non-muscle-invasive Bladder Cancer (NMIBC) Incorporating the WHO 2004/2016 and WHO 1973 Classification Systems for Grade: An Update from the EAU NMIBC Guidelines Panel" [Eur. Urol. 79(4) (2021) 480-488] - Sylvester, Richard J; Rodríguez, Oscar; Hernández, Virginia; Turturica, Diana; Bauerová, Lenka; Max Bruins, Harman; Bründl, Johannes; van der Kwast, Theo H; Brisuda, Antonin; Rubio-Briones, José; Seles, Maximilian; Hentschel, Anouk E; et al. (European urology, 2023)