1. Mental Health and Wellbeing Research Group, Department of Public Health, Vrije Universiteit Brussel, Brussel, Belgium.
2. Coma Science Group, Cyclotron Research Centre and Neurology Department, University and University Hospital of Liège, Liège, Belgium.
3. Department of Anesthesiology & Perioperative Medicine, Vrije Universiteit Brussel, Brussel, Belgium.