Fenna van Nes (Research Group Occupational Therapy , ACHIEVE, Centre of Applied Research, Faculty of Health, Amsterdam University of Applied Sciences, Amsterdam, the Netherlands.), Tineke Abma (Medical Humanities, VU University Medical Center, Amsterdam, The Netherlands), Hans Jonsson (Division of Occupational Therapy, Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden), Raymond Ostelo (Department of Health Sciences, VU University, Amsterdam and at the Department of Epidemiology and Biostatistics, VU University Medical Centre, Amsterdam, the Netherlands), Dorly Deeg (EMGO Institute for Health and Care Research, VU University Medical Centre, Amsterdam, The Netherlands.)