1. Center for Outcomes Research and Evaluation, Maine Medical Center, Portland, ME, USA
2. Tufts University School of Medicine, Boston, MA, USA
3. Department of Emergency Medicine, Maine Medical Center, Portland, ME, USA
4. Department of Medicine, Maine Medical Center, Portland, ME, USA
5. Department of Medicine, Nordland Hospital Trust, Bodø, Norway
6. Department of Community Medicine, UiT The Arctic University of Norway, Tromsø, Norway
7. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
8. HØKH Research Center, Akershus University Hospital, Lørenskog, Norway