1. Research School of Health and Welfare; Jönköping University; Jönköping Sweden
2. Department of Anaesthesia and Intensive Care; Ryhov County Hospital; Jönköping Sweden
3. School of Health and Caring Sciences; Linnaeus University; Kalmar Sweden
4. Department of Medical and Health Sciences; Division of Nursing Science; Linköping University; Linköping Sweden
5. The Research Unit; Kalmar County Hospital; Kalmar Sweden
6. Department of Clinical Neurophysiology; University Hospital; Linköping Sweden