[1] Aberdeen Royal Infirm, Dept Surg, HPB Surg Unit, NHS Grampian, Aberdeen, Scotland
[2] Nanjing Univ, Jinling Hosp, Surg Crit Care, Nanjing, Peoples R China
[3] Aberdeen Royal Infirm, Dept Surg, Colorectal Surg Unit, NHS Grampian, Aberdeen, Scotland
[4] WITS Univ Hosp, Dept Surg, Johannesburg, South Africa
[5] Policlin Gemelli, Dept Surg, Rome, Italy
[6] Klinikum Oldenburg, Dept Gastroenterol & Intervent Endoscopy, Oldenburg, Germany
[7] Freeman Rd Hosp, Dept HPB & Liver Transplant Surg, Newcastle Upon Tyne, England
[8] Sichuan Univ, West China Hosp, Chengdu, Peoples R China
[9] Manchester Royal Infirm, HPB Surg Unit, Manchester, England
[10] Auckland Univ Hosp, Dept Gen Surg, Upper GI Unit, HBP, Auckland, New Zealand
[11] Elite Hosp, Dr Grays Hosp, Scotland Integrated Ctr HPB Care, Dept Surg,NHS Grampian, Alexandria, Egypt
[12] Elite Hosp, Surg Div, Hepat, 1 Villas St,Ring Rd, Alexandria, Egypt