1. Department of Anesthesiology, Pain and Palliative Medicine; Radboud University Nijmegen Medical Centre; Nijmegen the Netherlands
2. Scientific Institute for Quality of Healthcare; Radboud University Nijmegen Medical Centre; Nijmegen the Netherlands
3. Department of Primary and Community Care; Radboud University Nijmegen Medical Centre; Nijmegen the Netherlands
4. Kalorama Foundation; Beek-Ubbergen the Netherlands