1. Department of Intensive Care Holbæk Hospital Holbæk Denmark
2. Department of Intensive Care, Rigshospitalet University of Copenhagen Copenhagen Denmark
3. Collaboration for Research in Intensive Care (CRIC) Copenhagen Denmark
4. Department of Medicine McMaster University Hamilton Ontario Canada
5. Department of Clinical Epidemiology and Biostatistics McMaster University Hamilton Ontario Canada
6. Department of Clinical Medicine University of Copenhagen Copenhagen Denmark