1 Department of Anaesthesiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia; Department of Cardiac Anesthesiology & Intensive Care Medicine, Charité Berlin, Germany. Electronic address: zheng_yii@hotmail.com.
2 Department of Cardiac Anesthesiology & Intensive Care Medicine, Charité Berlin, Germany; University Hospital Würzburg, Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine, Würzburg, Germany.
3 Department of General, Visceral, and Transplantation Surgery, University Medical Center, Campus Grosshadern, LMU Munich, Germany.
4 Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Kiel, Kiel, Germany.
5 Clinical Evaluation Research Unit, Department of Critical Care Medicine, Queen's University, Kingston, ON, K7L 3N6, Canada.
6 Department of Dietetics and Nutrition, Ng Teng Fong General Hospital, Singapore 1 Jurong East Street 21, Singapore 609606, Singapore.