1. Department of Clinical Neuroscience Institute of Neuroscience and Physiology Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. Department of Pediatrics Institute of Clinical Sciences Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
3. Department of Ophthalmology King Abdulaziz University Hospital Jeddah Saudi Arabia
4. Department of Clinical Neurophysiology Institute of Neuroscience and Physiology Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
5. Department of Ophthalmology Sahlgrenska University Hospital Gothenburg Sweden