Rechallenge pemetrexed-based chemotherapy provides an option for initially benefited patients with advanced lung adenocarcinoma oleh Jia-Ni Wang, Quan-Hui Qiao, Xing-Sheng Hu, Yu-Tao Liu, Zhi-Jie Wang, Jian-Chun Duan, Yu Feng, Hao-Hua Zhu, Li-Shao Guo