1. Lecturer, Department of Nursing, Faculty of Health Sciences, VIA University College; DK-8200 Aarhus N Denmark
2. Clinical Nurse Specialist, Aarhus University Hospital, Department of Neurosurgery NK; Dk-8000 Aarhus C Denmark
3. Clinical Nurse Specialist, Aarhus University Hospital, Department of Anaesthesiology and Intensive Care; DK-8200 Aarhus N Denmark
4. Clinical Nurse Specialist, Associated Professor, Aarhus University, Department of Public Health, Section of Nursing Science, Aarhus University Hospital, Department of Anaesthesia and Intensive Care Medicine; Dk-8000 Aarhus C Denmark