1. Department of Internal Medicine and Clinical Nutrition; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
2. Department of Paediatrics Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
3. The OLIN Studies; Department of Medicine; Sunderby Central Hospital of Norrbotten; Luleå Sweden
4. Department of Public health and Clinical medicine; Department of Medicine; University of Umeå; Umeå Sweden
5. Department of Public Health and Community Medicine; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden