Single-cell analysis reveals clonally expanded tumor-associated CD57+ CD8 T cells are enriched in the periphery of patients with metastatic urothelial cancer responding to PD-L1 blockade ========================================================================================================================================================================================== * Michael Fehlings * Leesun Kim * Xiangnan Guan * Kobe Yuen * Alireza Tafazzol * Shomyseh Sanjabi * Oliver A Zill * Deepali Rishipathak * Andrew Wallace * Alessandra Nardin * Siming Ma * Ana Milojkovic * Evan W Newell * Sanjeev Mariathasan * Mahesh Yadav