1. Department of Clinical Research, Copenhagen University Hospital, Hvidovre, Denmark
2. Emergency Department, Copenhagen University Hospital, Hvidovre, Denmark
3. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
4. Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
5. Department of Public Health, Section of Biostatistics, University of Copenhagen, Copenhagen, Denmark
6. Department of Public Health, Section for Health Services Research, University of Copenhagen, Copenhagen, Denmark