1. Department of Thoracic Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
2. Department of Biotherapy, Cancer Center, Chengdu, Sichuan 610041, P.R. China
3. Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China