1. Department of General Practice & Elderly Care Medicine, VU University Medical Center, Amsterdam, The Netherlands
2. Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
3. Trimbos-Instituut—The Netherlands Institute of Mental Health and Addiction, Utrecht, The Netherlands
4. Department of Public and Occupational Health, VU University Medical Center, Amsterdam, The Netherlands
5. Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, The Netherlands
6. Department of Primary and Community Care, Radboud university medical center, Nijmegen, The Netherlands