In vitro characterization of a small molecule PD-1 inhibitor that targets the PD-l/PD-L1 interaction. - Lu, Chih-Hao; Chung, Wei-Min; Tsai, Chun-Hao; Cheng, Ju-Chien; Hsu, Kai-Cheng; Tzeng, Huey-En (Scientific Reports, 2022)