1. Department of Anesthesia and Intensive Care Medicine CHU Liège University of Liège Liège Belgium
2. Dietary and Nutrition Services CHU Liège University of Liège Liège Belgium
3. Haute Ecole de la Province de Liège, Dietetics Section Jemeppe Belgium
4. Groupe francophone de réhabilitation améliorée après chirurgie (GRACE; Francophone group for enhanced recovery after surgery) Beaumont France