1. Research Group Occupation & Health, HAN University of Applied Sciences, Nijmegen, The Netherlands
2. Dutch Institute of Allied Health Care, Amersfoort, The Netherlands
3. Department of Epidemiology, Maastricht University, Maastricht, The Netherlands
4. Department of Primary and Community Care, Centre for Family Medicine, Geriatric Care and Public Health, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands