1. Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, China
2. National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
3. Department of Anesthesiology, Shenzhen Hospital, Southern Medical University, Guangdong, China
4. Department of Thoracic Surgery, Xiangya Hospital, Central South University, Changsha, China