1. Department of Public Health, Erasmus Medical Centre, Rotterdam, the Netherlands.
2. Laurens Antonius IJsselmonde, Rotterdam, the Netherlands.
3. Department of Medical Oncology, Erasmus MC, University Medical Center, Rotterdam, the Netherlands.
4. Department of Anaesthesiology, VU University Medical Center Amsterdam, the Netherlands.
5. EMGO Institute for Health and Care Research, Amsterdam, the Netherlands.
6. Julius Centre for Health Sciences and Primary Care, University Medical Center, Utrecht, the Netherlands.