1. Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian Province, China
2. Key Laboratory of Ministry of Education of Gastrointestinal Cancer, Fujian Medical University, Fuzhou, Fujian Province, China
3. Department of Gastrointestinal Surgery, Qinghai University Affiliated Hospital, Xining, China
4. Department of Digestive Surgery, St Mary’s Hospital, Terni, Italy
5. Department of Surgical Sciences, La Sapienza University of Rome, Rome, Italy
6. Section of Hepatobiliary and Pancreatic Surgery, Division of Subspecialty General Surgery, Department of Surgery, Mayo Clinic, Rochester, Minnesota