1. Department of Anaesthesia and Intensive Care in Norrköping, and Department of Biomedical and Clinical Sciences Linköping University Linköping Sweden
2. Department of Anaesthesia and Intensive Care in Linköping, and Department of Biomedical and Clinical Sciences Linköping University Linköping Sweden
3. Department of Surgery in Norrköping, and Department of Biomedical and Clinical Sciences Linköping University Norrköping Sweden
4. Department of Biomedical and Clinical Sciences and Forum Östergötland Linköping University Linköping Sweden