1. Department of Anaesthesia and Intensive Care Medicine; Aarhus University Hospital; Aarhus C; Denmark
2. Trauma Centre; Copenhagen University Hospital Rigshospitalet; Copenhagen; Denmark
3. Centre for Psychiatric Research; Aarhus University Hospital; Risskov; Denmark
4. Department of Anaesthesia; Hillerød Hospital; Hillerød; Denmark
5. Department of Biostatistics; Aarhus University; Aarhus C; Denmark