Affiliation: | 1. Department of Neurology, Landspitali ‐ National University Hospital, Reykjavik, Iceland;2. Department of Neurology, Odense University Hospital, Odense, Denmark;3. Department of Ophthalmology, Landspitali ‐ National University Hospital, Reykjavik, Iceland;4. University of Iceland, Reykjavik, Iceland |