1. Department of Health Services Research, CAPHRI School for Public Health and Primary Care, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
2. Department of Methodology & Statistics, CAPHRI School for Public Health and Primary Care, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
3. School of Dementia Studies, Faculty of Health Studies, University of Bradford, Bradford, United Kingdom