1. Section of Health Care Research and Rehabilitation Research, Medical Centre–University of Freiburg, Faculty of Medicine University of Freiburg Freiburg Germany
2. Department of Neurosurgery, Department of Neurology and Neuroscience, Faculty of Medicine, Medical Center–University of Freiburg University of Freiburg Freiburg Germany
3. Department for Nursing Science, Faculty of Health University Witten/Herdecke Witten Germany
4. Institute of Nursing Science University of Freiburg Freiburg Germany