1. Angereds Närsjukhus. Angered, Sweden
2. Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
3. Department of Public Health and Caring Sciences, Preventive Medicine, Uppsala University, Uppsala, Sweden
4. Department of Public Health and Clinical Medicine, Occupational Medicine, University of Umeå, Umeå, Sweden
5. Department of Health Sciences, Mid Sweden University, Sundsvall, Sweden