1. Swiss Paraplegic Research, Guido A. Zäch Institute, 6207 Nottwil, Switzerland
2. Department of Health Sciences and Medicine, University of Lucerne, 6002 Lucerne, Switzerland
3. Department of Research, Sunnaas Rehabilitation Hospital, 1453 Nesoddtangen, Norway
4. Department of Rehabilitation, Medical University of Warsaw, 02-091 Warsaw, Poland
5. Department of Rehabilitation Medicine, Universiti Malaya, Kuala Lumpur 50603, Malaysia
6. Faculty of Health Sciences, Klaipeda University, 92255 Klaipeda, Lithuania
7. Faculty of Medicine, University of São Paulo, São Paulo 01246-903, Brazil
8. John Walsh Centre for Rehabilitation Research, The Kolling Institute, St Leonards 2065, Australia
9. Faculty of Medicine and Health, University of Sydney, Sydney 2006, Australia
10. Department of Rehabilitation Medicine, Hannover Medical School, 30625 Hannover, Germany
11. Center for Primary and Community Care, University of Lucerne, 6002 Lucerne, Switzerland