1. Department of Spine SurgerySchulthess Klinik Zürich Switzerland
2. Department of Trauma SurgeryRegensburg University Medical Center Regensburg Germany
3. Institute for Biomechanics, Department of Health Sciences and Technology ETH Zürich, Zürich Switzerland
4. Spine Center, Schön Klinik München Munich Germany
5. Academic Teaching Hospital and Spine Research InstituteParacelsus Private Medical University Salzburg Austria
6. Department of Health ScienceUniversity of Potsdam Potsdam Germany
7. Department of Orthopaedic and Trauma SurgeryCampus Bio‐Medico University of Rome Rome Italy
8. Nuffield Department of OrthopaedicsRheumatology and Musculoskeletal Sciences (NDORMS), University of Oxford Oxford UK
9. Department of Physiology, Anatomy and GeneticsUniversity of Oxford Oxford UK