Toripalimab in combination with HBM4003, an anti-CTLA-4 heavy chain-only antibody, in advanced melanoma and other solid tumors: an open-label phase I trial oleh Michael Lee, Jing Chen, Li Yao, Yu Chen, Yu Jiang, Feng Li, Xiubao Ren, Jun Guo, Bixia Tang, Chuanliang Cui, Gang Huang, Shuai Zhao, Zhihong Chi, Meng Qi, Xiaolu Tao, Quanli Gao, Xiaoshi Zhang, Meiyu Fang, Fei Zheng, Rongqing Li, Meijuan Gao, Ruixuan Luo, Rong Duan