[1] Musculoskeletal Univ Ctr Munich MUM, Univ Hosp, LMU Munich, Dept Orthopaed & Trauma Surg, D-81377 Munich, Germany
[2] AUC Acad Trauma Surg, D-80538 Munich, Germany
[3] AUVA Traumahosp Styria, A-8020 Graz, Austria
[4] DRK Kliniken Nordhessen, Ctr Orthoped & Trauma Surg, D-34121 Kassel, Germany
[5] Marienhospital, Dept Orthoped & Trauma Surg, D-70199 Stuttgart, Germany
[6] Ludwig Maximilians Univ Munchen, Univ Hosp, Dept Med 4, D-80336 Munich, Germany