British journal of surgery, 104(5), 525-535. John Wiley and Sons Ltd British Journal of Surgery, 104(5). Wiley British Journal of Surgery, 104(5), 525-535. Wiley British Journal of Surgery, 104(5), 525-535. John Wiley & Sons Ltd. British Journal of Surgery, 104, 525-535 British Journal of Surgery, 104, 5, pp. 525-535