1. Department of Neurology, Aarhus University Hospital, Aarhus N, Denmark
2. Department of Public Health, Section of Nursing, Faculty of Health, Aarhus University, Copenhagen NV, Denmark
3. The Danish National Rehabilitation Center for Neuromuscular Diseases, Aarhus, Denmark
4. Section of Nursing, Institute of Public Health, Aarhus University Hospital, Aarhus University, Aarhus, Denmark
5. Department of Intensive Care, University of Bergen, Bergen, Denmark