1. Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavik, Iceland
2. Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden
3. Department of Epidemiology, Harvard TH Chan School of Public Health, Boston, MA, USA
4. Research Institute in Emergency Care, The National University Hospital of Iceland, Reykjavík, Iceland
5. Faculty of Nursing, University of Iceland, Reykjavik, Iceland
6. Stockholm Centre for Psychiatric Research and Education, Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
7. Faculty of Economics, University of Iceland, Reykjavik, Iceland