Characteristics and immune checkpoint inhibitor effects on non-smoking non-small cell lung cancer with KRAS mutation oleh Jia-Jun Wu, MD, Po-Hsin Lee, MD, Zhe-Rong Zheng, MD, Yen-Hsiang Huang, MD, Jeng-Sen Tseng, MD, PhD, Kuo-Hsuan Hsu, MD, Tsung-Ying Yang, MD, PhD, Sung-Liang Yu, PhD, Kun-Chieh Chen, MD, PhD, Gee-Chen Chang, MD, PhD