1 Department of Primary and Community Care, Center for Family Medicine, Geriatric Care and Public Health, Radboud University Medical Center, Nijmegen, The Netherlands; Radboud Alzheimer Center, Nijmegen, The Netherlands; Joachim en Anna, Center for Specialized Geriatric Care, Nijmegen, The Netherlands. Electronic address: Raymond.Koopmans@radboudumc.nl.
2 Department of General Practice and Elderly Care Medicine, VU University Medical Center, EMGO Institute for Health and Care Research, Amsterdam, The Netherlands.
3 Department of Primary and Community Care, Center for Family Medicine, Geriatric Care and Public Health, Radboud University Medical Center, Nijmegen, The Netherlands; Florence Mariahoeve Center for Specialized Care in Young-onset Dementia, Den Haag, The Netherlands.