1. Swiss Paraplegic Research, ICF Unit, Nottwil, Switzerland;
2. Department of Health Sciences and Health Policy, University of Lucerne, Lucerne, Switzerland;
3. Department of Medical Informatics, Biometry and Epidemiology – IBE, Chair for Public Health and Health Services Research, Research Unit for Biopsychosocial Health, Ludwig-Maximilians-University (LMU), Munich, Germany;
4. ICF Research Branch a Cooperation Partner within the WHO Collaborating Centre for the Family of International Classifications in Germany (at DIMDI), Nottwil, Switzerland