Effects of glutamine supplementation to total parenteral nutrition after elective abdominal surgery : F. Hammarqvist, J. Wernerman, R. Ali, A. von der Decken, E. Vinnars. Departments of Anaesthesiology, Surgery and Intensive Care and the Metabolic Research Laboratory, St Göran's Hospital, Department of Anaesthesiology and Intensive Care, Huddinge University Hospital and the Wenner-Gren Institute for Experimental Biology, Stockholm, Sweden