1 Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China; Lung Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
2 IOE, UCL's Faculty of Education and Society, University College London, 20 Bedford Way, London, WC1H 0AL, UK.
3 Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China; Lung Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China. Electronic address: cheguoweixw@126.com.