1. Department of Trauma SurgeryAUVA Trauma Center Meidling Kundratstrasse 37 Vienna A‐1120 Austria
2. Medical Department II—VINFORCE Study Group, St. Vincent HospitalAcademic Teaching Hospital of the Medical University of ViennaStumpergasse 13 Vienna A‐1060 Austria
3. Karl Landsteiner Institute for GastroenterologyRheumatology, and Osteology Stumpergasse 13 Vienna A‐1060 Austria
4. Medical Faculty, Bone Diseases UnitSigmund Freud UniversityFreudplatz 1 Vienna A‐1020 Austria
5. Department of Statistics and Operations ResearchUniversity of Vienna Oskar‐Morgenstern‐Platz 1 Vienna A‐1090 Austria
6. Charité—Universitätsmedizin Berlin, Campus VirchowCenter for Musculoskeletal SurgeryAugustenburger Platz 1 Berlin D‐13353 Germany
7. Department of Physical Medicine and RehabilitationDanube Hospital—Social Medical Center EastLangobardenstrasse 122 Vienna A‐1220 Austria
8. Department of Surgery, Austrian Armed ForcesMilitary Medical Cluster EastBruenner Strasse 238 Vienna A‐1210 Austria
9. Medical Faculty, Traumatology UnitSigmund Freund UniversityFreudplatz 1 Vienna A‐1020 Austria
10. Department of Physical Medicine, Rehabilitation and Occupational MedicineMedical University of ViennaWaehringer Guertel 18‐20 Vienna A‐1090 Austria