1. Department of Health Sciences and TechnologyInstitute for Biomechanics ETH Zurich Switzerland
2. Department of Oncology and HematologyCantonal Hospital St Gallen St Gallen Switzerland
3. Department of BioengineeringUniversity of Utah Salt Lake City Utah
4. Department of OrthopaedicsUniversity of Utah Salt Lake City Utah
5. Spine CenterSchön Klinik München Harlaching Munich Germany
6. Academic Teaching Hospital and Spine Research InstituteParacelsus Private Medical University Salzburg Salzburg Austria
7. Department of Health SciencesUniversity of Potsdam Potsdam Germany