| Affiliation: | 1. Faculty of Medicine, Department of Public Health and General Practice, Norwegian University of Science and Technology, Trondheim, Norway;2. Department of Circulation and Medical Imaging NTNU, Norwegian University of Science and Technology, Trondheim, Norway;3. Department of Thoracic and Occupational Medicine, Trondheim University Hospital, Trondheim, Norway;4. Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA;5. Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, USA;6. Faculty of Medicine, School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa, Ottawa, Ontario, Canada |
