1. Center for Eye Research, Department of Ophthalmology, Oslo University Hospital and University of Oslo, Oslo, Norway
2. Norwegian Center for Stem Cell Research, Oslo University Hospital and University of Oslo, Oslo, Norway
3. Department of Medical Biochemistry, Oslo University Hospital, Norway
4. Department of Ophthalmology, Faculty of Medicine, University of Szeged and Stem Cells and Eye Research LaboratorySzeged, Hungary
5. Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary