1. Department of Clinical Sciences, Ophthalmology, Umeå University, Umeå, Sweden
2. Department of Radiation Sciences, Radiation Physics, Biomedical Engineering, Umeå University, Umeå, Sweden
3. Umeå Centre for Functional Brain Imaging, Umeå University, Umeå, Sweden
4. Wallenberg Center for Molecular Medicine, Umeå University, Umeå, Sweden
5. Department of Ophthalmology, University of Iceland, Reykjavik, Iceland