1. Department of Minimally Invasive Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (mainland)
2. Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China (mainland)
3. Department of General Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, China (mainland)