1. Department of Neuroscience/ophthalmology; Uppsala University; Uppsala Sweden
2. Department of Clinical Sciences, Ophthalmology; Skane University Hospital; Lund University; Lund Sweden
3. Department of Clinical and Experimental Medicine; Linköping University; Linköping Sweden
4. Department of Clinical Sciences, Ophthalmology; Umeå University; Umeå Sweden
5. St. Erik Eye Hospital; Stockholm Sweden
6. Section for Ophthalmology; Department of Clinical Neuroscience and rehabilitation; Institute of Neuroscience and Physiology; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden