1. Department of Hepatobiliary Pancreatic Surgery, Jilin Province Peoples’ Hospital, Changchun, Jilin, China (mainland)
2. Department of Otolaryngology Head and Neck Surgery, First Bethune Hospital of Jilin University, Changchun, Jilin, China (mainland)
3. Department of Gynecology and Obstetrics, Yancheng Third Peoples’ Hospital, Yancheng, Jiangsu, China (mainland)
4. Department of General Surgery, Yancheng Third Peoples’ Hospital, Yancheng, Jiangsu, China (mainland)