1. Department of Ophthalmology; Donders Institute for Brain; Cognition and Behaviour; Radboud University Medical Center; Nijmegen The Netherlands
2. Department of Health Evidence; Radboud University Medical Center; Nijmegen The Netherlands
3. Department of Internal Medicine; Radboud University Medical Center; Nijmegen The Netherlands
4. Department of Ophthalmology; Erasmus Medical Center; Rotterdam The Netherlands
5. Department of Epidemiology; Erasmus Medical Center; Rotterdam The Netherlands