Nivolumab monotherapy in recurrent metastatic urothelial carcinoma (CheckMate 032): a multicentre, open-label, two-stage, multi-arm, phase 1/2 trial - Sharma, P; Callahan, M K; Bono, P (The Lancet Oncology, 2016)
. doi:10.1016/S1470-2045(16)30496-X