1 Department of Cardiothoracic Surgery, First Affiliated Hospital of Chengdu Medical College, Chengdu, China.
2 Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu, China.
3 Acupuncture and Moxibustion School of Teaching Hospital of Chengdu University of TCM, Chengdu, China; Ministry of Education, Key Laboratory of Hainan Trauma and Disaster Rescue, College of Emergency and Trauma, Hainan Medical University, Haikou, China.