[1] Univ Liverpool, Dept Mol & Clin Canc Med, Inst Syst Mol & Integrat Biol, Liverpool, England
[2] Liverpool Univ Teaching Hosp NHS Fdn Trust, Dept Hepatobiliary Surg, Prescot St, Liverpool L7 8YE, England
[3] Univ Oxford, Dept Oncol, Oxford, England
[4] Cambridge Univ Hosp NHS Fdn Trust, Dept Oncol, Cambridge, England
[5] Univ Sheffield, Dept Oncol, Western Bank, Sheffield, England
[6] Countess Chester NHS Fdn Trust, Dept Colorectal Surg, Chester, England