1. Department of Public Health and Primary Care, Leiden University Medical Center, RC Leiden, The Netherlands
2. Department of Biomedical Data Sciences—Medical Decision Making, Leiden University Medical Center, RC Leiden, The Netherlands
3. Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, RC Leiden, The Netherlands
4. Department of Internal Medicine, Section Gerontology and Geriatrics, Leiden University Medical Center, RC Leiden, The Netherlands
5. Department of General Practice, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, GA Utrecht, The Netherlands
6. Erasmus School of Health Policy & Management, Erasmus University Rotterdam, CA Rotterdam, The Netherlands
7. Department of General Practice and Elderly Care Medicine, Amsterdam Public Health Research Institute, VU University Medical Center, MB Amsterdam, The Netherlands
8. Department of Health Services Research, Care and Public Health Research Institute (CAPHRI), Maastricht University, MD Maastricht, The Netherlands
9. Department of Primary and Community Care, Radboud Institute for Health Sciences, Radboud University Medical Center, HB Nijmegen, The Netherlands
10. Department of Geriatric Medicine, Radboud Institute for Health Sciences, Radboud University Medical Center, HB Nijmegen, The Netherlands
11. Department of General Practice, Academic Medical Center, DD Amsterdam, The Netherlands
12. Department of Health Sciences, Community and Occupational Medicine, University Medical Center Groningen, University of Groningen, Internal postal code FA10, AD Groningen, The Netherlands
13. Department of Medical Statistics, Leiden University Medical Center, RC Leiden, The Netherlands