1. Department of Clinical Neuroscience and Rehabilitation/Ophthalmology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden 2Department of Ophthalmology, Sahlgrenska University Hospital, Mölndal,
2. Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at University of Gothenburg, Mölndal, Sweden 4UCL Institute of Neurology, London, United Kingdom