| Affiliation: | 1. Swiss Paraplegic Research, Nottwil, Switzerland;2. Department of Sports Medicine and Sports Nutrition, Ruhr University Bochum, Bochum, Germany;3. Department of Health Sciences and Health Policy, University of Lucerne, Lucerne, Switzerland;4. Institute of General Practice and Family Medicine, Witten/Herdecke University, Witten, Germany;5. Institute of General Practice, Heinrich Heine University Düsseldorf, Düsseldorf, Germany;6. Department of Medical Informatics, Biometry and Epidemiology, Ruhr University Bochum, Bochum, Germany;7. Institute of Sport and Exercise Sciences, University of Münster, Münster, Germany |
