1 Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.
2 Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China.
3 Hospital Infection Control Center, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China.
4 Department of Laboratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.
5 Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China; Department of Anesthesiology, Guilin Hospital of the Second Xiangya Hospital, Central South University, Guilin, Guangxi, China.
6 Department of Anesthesiology, Wenzhou People's Hospital, Wenzhou, Zhejiang, China.
7 Department of Clinical Microbiology Laboratory, Chenzhou No. 1 People's Hospital, Chenzhou, Hunan, China.
8 Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China. Electronic address: [email protected].