1. Department of Anaesthesiology and Reanimation, CHU Liège, University of Liège, domaine universitaire du Sart Tilman , Liège , Belgium
2. Pain Clinic, CHU Liège, University of Liège, domaine universitaire du Sart Tilman , Liège , Belgium
3. Service of Gastroenterology, Hepatology, and Digestive Oncology, CHU Liège, University of Liège, domaine universitaire du Sart-Tilman , Liège , Belgium