1. Department of Ophthalmology, Oslo University Hospital, Oslo, Norway
2. Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
3. Department of Ophthalmology, Vestre Viken Hospital, Drammen, Norway
4. Division of Radiology and Nuclear Medicine, Department of Radiology, Oslo University Hospital–Rikshospitalet, Oslo, Norway
5. Department of Neurosurgery, Oslo University Hospital–Rikshospitalet, Oslo, Norway