1. Department of General Surgery, The Central Hospital of Xiangtan City, Xiangtan, Hunan, China (mainland)
2. Department of Emergency, The Eastern Hospital of The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China (mainland)
3. Department of Science and Education, The Central Hospital of Xiangtan City, Xiangtan, Hunan, China (mainland)