ALB and ileus: Any of the following features if no other explanation can be provided:WBC count of >15 000 cells ml−1 or a rise in serum creatinine level >50% above baseline or core body temperature >38.5 °C.Rigours, haemodynamic instability, peritonitis or evidence of bowel perforation, ileus or toxic megacolon, elevated lactate level, albumin level <25 mg l−1, large intestine distension, colonic wall thickening, fat stranding, unexplained ascites (imaging) or pseudomembranous colitis on colonoscopy.