1. Palliative Care Centre, Laurens Cadenza, Rotterdam, the Netherlands.
2. Pain Expertise Centre, Erasmus MC-Sophia Children's Hospital, Rotterdam, the Netherlands.
3. Intensive Care, Department of Paediatric Surgery, Erasmus MC-Sophia Children's Hospital, Rotterdam, the Netherlands.
4. Hospital Pharmacy–Clinical Pharmacology, Academic Medical Centre, Amsterdam, the Netherlands.
5. Department of Hospital Pharmacy, Erasmus Medical Centre, Rotterdam, the Netherlands.