1. Department of General Surgery, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China (mainland)
2. Department of Intensive Care Unit, Qingdao Municipal Hospital Group, Qingdao University, Qingdao, Shandong, China (mainland)
3. Hunan International Travel Health Care Center, Changsha, Hunan, China (mainland)
4. Department of Transplant Surgery, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China (mainland)