1. Department of Ophthalmology Västmanland County Hospital Västerås Sweden
2. Center for Clinical Research Västmanland County Hospital Uppsala University/County Council of Västmanland Västerås Sweden
3. Department of Statistics Stockholm University Stockholm Sweden
4. Department of Medical Sciences Clinical Diabetology and Metabolism Uppsala University Hospital Uppsala University Uppsala Sweden
5. Department of Ophthalmology Region Dalarna Falun Falun Sweden
6. School of Education, Health and Social Studies Dalarna University Falun Sweden
7. Sachs’ Children and Youth's Hospital Södersjukhuset Stockholm Sweden
8. Department of Clinical Research and Education Karolinska Institutet Södersjukhuset Stockholm Sweden