1 Department of Dietetics & Nutrition, Ng Teng Fong General Hospital, Singapore, Singapore.
2 Department of Anesthesiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
3 The Copenhagen Trial Unit, Centre for Clinical Intervention Research, The Capital Region, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
4 Department of Regional Health Research, The Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.