1. Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
2. Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
3. Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, Massachusetts, USA
4. Department of Ophthalmology, Innland Hospital, Elverum, Norway
5. Synslaser Kirurgi AS, Oslo, Norway