1 Center of Expertise for Palliative Care, Maastricht University Medical Center+ (MUMC+), Maastricht, the Netherlands.
2 Division of General Medicine, Department of Internal Medicine, Section of Geriatric Medicine, Maastricht University Medical Center+, Maastricht University, Maastricht, the Netherlands.
3 Department of Research & Development, Ciro, Horn, the Netherlands; Department of Health Services Research, Care and Public Health Research Institute, Faculty of Health Medicine and Life Sciences, Maastricht University, Maastricht, the Netherlands.
4 Department of Clinical Epidemiology and Medical Technology, Maastricht University Medical Centre, Maastricht, the Netherlands.