[1] Department of Medical Sciences, Occupational and Environmental Medicine, Uppsala University, Uppsala, Sweden
[2] Department of Medical Sciences, Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
[3] Department of Medical Sciences, Clinical Physiology, Uppsala University, Uppsala, Sweden
[4] Occupational and Environmental Medicine, Gothenburg University, Gothenburg, Sweden
[5] Department of Surgical and Preoperative Sciences, Surgery, Umeå University, Umeå,SE-901 85, Sweden
[6] Department of Public Health and Clinical Medicine, Sustainable Health, Umeå University, Umeå, Sweden
[7] Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
[8] Department of Public Health, Environment, Occupation and Health, Danish Ramazzini Centre, Aarhus University, Aarhus, Denmark
[9] Department of Sleep, Landspitali University Hospital, Reykjavik, Iceland
[10] Faculty of Medicine, University of Iceland, Reykjavik, Iceland
[11] Department of Occupational Medicine, Haukeland University Hospital, Bergen, Norway
[12] Department of Clinical Science, University of Bergen, Bergen, Norway