1. Department of Clinical Neuroscience, Institute of Neuroscience and Physiology, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. Department of Ophthalmology Region Västra Götaland, Sahlgrenska University Hospital Mölndal Sweden
3. Department of Neurology Region Västra Götaland, Sahlgrenska University Hospital Gothenburg Sweden
4. Department of Ophthalmology, Faculty of Medicine and Health Örebro University Örebro Sweden