1. Genetic Epidemiology and Clinical Research Group, Department of Public Health and Clinical Medicine, Section for Medicine, Umeå University Hospital, Umeå 901 87, Sweden
2. Metabolic Disease Group, The Wellcome Trust Sanger Institute, Cambridge CB10 1SA, UK
3. Department of Surgical and Perioperative Sciences, Section for Sports Medicine, Umeå University, Umeå 901 85, Sweden
4. Department of Community Medicine and Rehabilitation, Section for Rehabilitation Medicine, Umeå University Hospital, Umeå 901 87, Sweden
5. Department of Public Health and Clinical Medicine, Section for Family Medicine
6. Department of Public Health and Clinical Medicine, Section for Nutritional Research, Umeå University, Umeå 901 85, Sweden
7. Department of Community Medicine and Rehabilitation, Section for Geriatric Medicine, Umeå University Hospital, Umeå 901 87, Sweden