1 Windesheim University of Applied Sciences, Research Group Innovating with Older Adults, P.O. Box 10090, 8000 GB Zwolle, The Netherlands. Electronic address: ib.van.ee@windesheim.nl.
2 Leyden Academy on Vitality and Ageing, Rijnsburgerweg 10, 2333 AA Leiden, The Netherlands. Electronic address: slaets@leydenacademy.nl.
3 Windesheim University of Applied Sciences, Research Group Innovating with Older Adults, P.O. Box 10090, 8000 GB Zwolle, The Netherlands. Electronic address: chm.smits@windesheim.nl.
6 University of Groningen, University Medical Center Groningen, Health Psychology, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands. Electronic address: mariet.hagedoorn@umcg.nl.