1. Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
2. Anesthesia Operation Center, West China Hospital, Sichuan University, Chengdu 610041, China
3. West China School of Nursing, Sichuan University, Chengdu 610041, China
4. Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China