Comparison of three validated PD-L1 immunohistochemical assays in urothelial carcinoma of the bladder: interchangeability and issues related to patient selection oleh Enrico Munari, Giulia Querzoli, Matteo Brunelli, Marcella Marconi, Marco Sommaggio, Marco A. Cocchi, Guido Martignoni, Guido Martignoni, George J. Netto, Anna Caliò, Linda Quatrini, Francesca R. Mariotti, Claudio Luchini, Ilaria Girolami, Albino Eccher, Diego Segala, Francesco Ciompi, Giuseppe Zamboni, Giuseppe Zamboni, Lorenzo Moretta, Giuseppe Bogina