1. Department of Public Health and Clinical Medicine, Division of Epidemiology and Global Health, Umeå University , Umeå, Sweden
2. Umeå Centre for Global Health Research, Umeå University , Umeå, Sweden
3. Department of Public Health and Clinical Medicine, Division of Medicine, Umeå University , Umeå, Sweden
4. Department of Public Health and Clinical Medicine, Division of Occupational and Environmental Medicine, Umeå University , Umeå, Sweden
5. Centre for Population Studies, Ageing and Living Conditions Programme, Umeå University , Umeå, Sweden