1. Department of Gastroenterology, Fuzhou Second Hospital Affiliated to Xiamen University, Fuzhou, Fujian, China (mainland)
2. Department of General Surgery, Ningde Medical District, 900th Hospital of the Joint Logistics Team, People’s Liberation Army (PLA), Ningde, Fujian, China (mainland)
3. Department of Gastroenterology, 900th Hospital of the Joint Logistics Team, People’s Liberation Army (PLA), Fuzhou, Fujian, China (mainland)
4. Department of Hepatobiliary Surgery, 900th Hospital of the Joint Logistics Team, People’s Liberation Army (PLA), Fuzhou, Fujian, China (mainland)