1 Department of Primary and Community Care, Radboud University Medical Centre, Nijmegen, the Netherlands; Radboudumc Alzheimer Centre, Nijmegen, the Netherlands; Radboud Institute for Health Sciences, University Medical Centre, Nijmegen, the Netherlands. Electronic address: Debby.Gerritsen@radboudumc.nl.
2 Department of General Practice and Elderly Care Medicine, Amsterdam Public Health research institute, Amsterdam University Medical Centers, VU University Medical Centre, Amsterdam, the Netherlands.
3 Department of Primary and Community Care, Radboud University Medical Centre, Nijmegen, the Netherlands; Radboudumc Alzheimer Centre, Nijmegen, the Netherlands; Radboud Institute for Health Sciences, University Medical Centre, Nijmegen, the Netherlands.
4 Department of General Practice and Elderly Care Medicine, University of Groningen, University Medical Centre Groningen, Groningen, the Netherlands.
5 Department of Primary and Community Care, Radboud University Medical Centre, Nijmegen, the Netherlands; Radboudumc Alzheimer Centre, Nijmegen, the Netherlands; De Waalboog "Joachim en Anna", Centre for Specialized Geriatric Care, Nijmegen, the Netherlands.