The effect of exogenous glucagon-like peptide-1 on the glycaemic response to small intestinal nutrient in the critically ill: a randomised double-blind placebo-controlled cross over study - Deane,A.M.; Chapman,M.J.; Fraser,R.J.; Burgstad,C.M.; Besanko,L.K.; Horowitz,M. (Crit Care, 2009)