1. Department of Ophthalmology, Antwerp University Hospital, Edegem, Belgium
2. Department of Ophthalmology, Visual Optics and Visual Rehabilitation, Faculty of Medicine and Health Sciences, University of Antwerp, Belgium
3. Department of Ophthalmology, University Hospital Brussels, Jette, Belgium
4. Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Jette, Belgium