1. Department of Health Sciences, Hamburg University of Applied Sciences, Hamburg, Germany
2. Department of Physiotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
3. Department of Care and Management, Hamburg University of Applied Sciences, Hamburg, Germany
4. Department of Primary Medical Care, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
5. Faculty of Health/School of Medicine, Witten/Herdecke University, Witten, Germany