A Clinical Analysis of Anti-Programmed Death-Ligand 1 (PD-L1) Immune Checkpoint Inhibitor Treatments Combined with Chemotherapy in Untreated Extensive-Stage Small-Cell Lung Cancer Tekijä Ping-Chih Hsu, Bing-Chen Wu, Chin-Chou Wang, Li-Chung Chiu, Chiung-Hsin Chang, Ping-Chi Liu, Chiao-En Wu, Scott Chih-Hsi Kuo, Jia-Shiuan Ju, Allen Chung-Cheng Huang, Yu-Ching Lin, Cheng-Ta Yang, How-Wen Ko