Baoqing Chen1, Binbin Hu1, Weiying Li2, Jianxin Xue3. 1. Department of Thoracic Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China. 2. West China School of Medicine, Sichuan University, Chengdu 610041, China. 3. Department of Thoracic Oncology, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China. Electronic address: jianxin_xue@163.com.