1. Department of Ophthalmology, VU University Medical Center, Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
2. Department of Psychology, Health & Technology, University of Twente, Enschede, The Netherlands
3. Coronel Institute of Occupational Health, Academic Medical Center, Amsterdam Public Health Research Institute, University of Amsterdam, Amsterdam, The Netherlands
4. Department of Ophthalmology, Elkerliek Hospital, Helmond, The Netherlands