1. Spinal Cord Injury Center, Balgrist University Hospital, University of Zurich , 8008 Zurich, Switzerland
2. Integrative Spinal Research, Department of Chiropractic Medicine, University Hospital Balgrist, University of Zurich , 8008 Zurich, Switzerland
3. Physical Medicine and Rheumatology, Balgrist University Hospital , 8008 Zurich, Switzerland
4. Alan Edward Center for Research on Pain, McGill University , Montreal, Quebec, Canada
5. Department of Neurology, University Hospital Bern, Inselspital, University of Bern , Bern, Switzerland
6. Danish Pain Research Center, Department of Clinical Medicine, Aarhus University , Aarhus, Denmark