The prognostic significance of histologic variant on survival outcomes in patients with metastatic urothelial carcinoma receiving immune checkpoint inhibitor therapy oleh Tsung-Han Tsai, Po-Jung Su, Shih-Yu Huang, Ming-Chun Kuo, Chang-Ting Lin, Chia-Che Wu, Hao-Lun Luo, Chien-Hsu Chen, Chih-Chi Chou, Ting-Ting Liu, Chun-Chieh Huang, Kai-Lung Tsai, Yu-Li Su