1 Faculty of Social and Human Sciences, University of Southampton, Southampton, UK, Department of Medical Informatics, Biometry and Epidemiology, LMU Munich, Munich, Germany, Swiss Paraplegic Research, Nottwil, Switzerland.
2 Department of Medical Informatics, Biometry and Epidemiology, LMU Munich, Munich, Germany.
3 Swiss Paraplegic Research, Nottwil, Switzerland, Department of Health Sciences and Health Policy, University of Lucerne, Lucerne, Switzerland.
4 Departments of Psychiatry and Human Behavior and Neurology, Warren Alpert Medical School, Brown University, Providence, RI, USA.
5 Classification, Terminology and Standards, Department of Health Statistics and Informatics, World Health Organization, Geneva, Switzerland.
6 Hebrew Senior Life's Institute for Aging Research, Social and Health Policy Research, Boston, MA, USA and.
7 Multi-Country Studies, Department of Measurement and Health Information Systems, World Health Organization, Geneva, Switzerland.