1. School of Educational Sciences and Psychology, Philosophical Faculty, University of Eastern Finland, Joensuu, Finland
2. Department of Applied Physics, Faculty of Science and Forestry, University of Eastern Finland, Kuopio, Finland
3. School of Medicine, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
4. Department of Nursing Science, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
5. Institute of Public Health and Clinical Nutrition, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
6. Research and Service Centre of Occupational Health, Finnish Institute of Occupational Health, Helsinki, Finland
7. School of Medicine, Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
8. Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital, Kuopio Finland