1. Department of Primary and Community Care, Alzheimer Centre, Radboud university medical center, Nijmegen, The Netherlands
2. Alzheimer Center, Radboud university medical center, Nijmegen, The Netherlands
3. Thebe, Region South-East, Goirle, The Netherlands
4. Department of Clinical Psychology, VU University Amsterdam, The Netherlands
5. Netherlands Institute of Mental Health and Addiction, Utrecht, The Netherlands
6. School of Psychology, The University of Queensland, St Lucia, Australia
7. Joachim end Anna, Centre for specialized geriatric care, Nijmegen, The Netherlands