1. Centre of Expertise for Palliative Care; Maastricht University Medical Centre; Maastricht the Netherlands
2. Department of Anaesthesiology and Pain Management; Maastricht University Medical Centre; Maastricht the Netherlands
3. Department of Internal Medicine; University Medical Centre; Utrecht the Netherlands
4. Department of Neurology; Erasmus Medical Centre; Rotterdam the Netherlands
5. Pharmacy Koert; Utrecht the Netherlands
6. Knowledge Institute of Medical Specialists; Federation of Medical Specialists; Utrecht the Netherlands
7. Department of Anaesthesiology, Pain and Palliative Medicine; Radboud University Medical Centre; Nijmegen the Netherlands