Wei Dai1,2, Yunfei Mu3, Shuai Chang1, Zhong Wu4, Guowei Che5. 1. Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, China. 2. Department of Thoracic Surgery, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China. 3. Department of Thoracic Surgery, Chengdu Third People's Hospital, Chengdu, China. 4. Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu, China. 5. Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, China. cheguowei_hx@aliyun.com.