1. Shantou University of Medical College, Shantou 515000, China
2. Department of General Surgery, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
3. South China University of Technology School of Medicine, Guangzhou 51000, China
4. Sanshui Disease Prevention Cure Station, Foshan 528100, China
5. Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
6. Guangzhou Medical University, Guangzhou 511436, China
7. Department of General Surgery, Hui Ya Hospital of The First Affiliated Hospital, Sun Yat-sen University, Huizhou 516081, China
8. Department of Liver Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510000, China