1. Swiss Paraplegic Research (SPF); Nottwil Switzerland
2. ICF Research Branch in cooperation with the WHO Collaborating Centre for the Family of International Classifications in Germany (at DIMDI); Nottwil Switzerland
3. CAPHRI Research School; Maastricht University; Maastricht The Netherlands
4. Department of Epidemiology and Institute for Education; Maastricht University; Maastricht The Netherlands
5. Department of Physical Therapy; Louisiana State University Health Sciences Center; New Orleans LA USA
6. Department of Health Sciences and Health Policy; University of Lucerne; Lucerne Switzerland