[1] Ullevål University Hospital,Department of Paediatrics
[2] Ullevål University Hospital,Department of Ophthalmology
[3] Norwegian Institute of Public Health,Division of Epidemiology
[4] Ullevål University Hospital,Centre for Clinical Research
[5] Aker University Hospital and University of Oslo,Department of Endocrinology
[6] Aker and Ullevål University Hospitals,Diabetes Research Centre