1. Department of Anesthesiology/Pain Management; University Pain Center Maastricht; Maastricht University Medical Center; Universiteitssingel 50 6229 ER Maastricht Maastricht The Netherlands
2. School for Mental Health and Neuroscience; Maastricht University; Maastricht The Netherlands
3. University of Liège; GIGA-Neurosciences; 1 Avenue de l'Hôpital (Bat. B36) B-4000 Liège Belgium
4. Intensive Care; Erasmus MC-Sophia; Rotterdam The Netherlands
5. Department of Pediatric Surgery; Erasmus MC-Sophia; Rotterdam The Netherlands