1. Department of Public Health and Clinical Medicine, Sunderby Research Unit, Umeu University, Sweden
2. Department of Molecular and Clinical Medicine, University of Gothenburg, Sweden
3. Centre for Applied Biostatistics, Occupational and Environmental Medicine, University of Gothenburg, Sweden
4. Institute of Health and Care Sciences, University of Gothenburg, Sweden
5. Department of Medicine, St Vincent’s Hospital, Ireland
6. Trinity College Dublin, Ireland
7. Department of Health and Life Sciences, Linnaeus University, Sweden