1. Swiss Paraplegic Research, Nottwil, Switzerland
2. Department of Health Sciences, University of Lucerne, Lucerne, Switzerland
3. Institute of Sports Medicine, Swiss Paraplegic Centre, Nottwil, Switzerland
4. Institute of Social and Preventive Medicine (ISPM), University of Bern, Bern, Switzerland
5. Standard Process Nutrition Innovation Center, Kannapolis, NC, USA