1. Department of Clinical Neuroscience Institute of Neuroscience and Physiology The Sahlgrenska Academy at University of Gothenburg Gothenburg Sweden
2. Department of Ophthalmology Skaraborg Hospital Skövde Sweden
3. Department of Ophthalmology Uddevalla Hospital Uddevalla Sweden
4. Department of Ophthalmology Southern Älvsborg Hospital Borås Sweden
5. Department of Ophthalmology Sahlgrenska University Hospital Mölndal Sweden