1. Department of Hepatobiliary Surgery, Chinese People’s Liberation Army (PLA) General Hospital, Beijing, China (mainland)
2. Department of Pathology, Chinese People’s Liberation Army (PLA) General Hospital, Beijing, China (mainland)
3. Department of Anesthesia Operation Center, Chinese People’s Liberation Army (PLA) General Hospital, Beijing, China (mainland)
4. Department of General Surgery, The First Hospital of Yulin, Yulin, Shaanxi, China (mainland)