1. The Department of Spine Surgery, The People’s Hospital of Liuyang City, Changsha, Hunan Province, China
2. The Department of Anesthesiology, The People’s Hospital of Taizhou Affiliated to Dalian Medical University, Taizhou City, Jiangsu Province, China
3. The Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou City, Guangdong Province, China