[1] Univ Hosp Leipzig, Dept Orthopaed Trauma & Plast Surg, Leipzig, Germany
[2] BG Klinikum Bergmannstrost Halle, Dept Sci Res & Educ, Halle, Germany
[3] Sana Klinikum Borna, Interdisciplinary Ctr Spine & Neurotrauma, Borna, Germany
[4] Malteser Waldkrankenhaus St Marien, Ctr Spinal & Scoliosis Surg, Erlangen, Germany
[5] Paracelsus Private Med Univ Nuremberg, Dept Orthoped & Traumatol, Nurnberg, Germany
[6] Univ Hosp Giessen & Marburg GmbH, Ctr Orthopaed & Trauma Surg, Marburg, Germany
[7] Klinikum Traunstein, Dept Trauma & Orthoped Surg, Traunstein, Germany
[8] Schoen Klin Hamburg Eilbek, Dept Spine Surg, Hamburg, Germany
[9] Tech Univ Munich, Lehrkorper Med Fak, Med Fak TUM, Arabella Klin, Munich, Germany
[10] Univ Med Ctr Schleswig Holstein, Dept Orthoped & Trauma Surg, Campus Kiel, Kiel, Germany
[11] Univ Hosp Zurich, Dept Trauma, Zurich, Switzerland
[12] Univ Jena, Teaching Hosp, Dept Spine Surg, Thuringia Clin Georgius Agr Saalfeld, Saalfeld, Germany
[13] Univ Hosp Erlangen, Dept Trauma Surg, Erlangen, Germany
[14] BG Trauma Ctr, Spinal Cord Unit, Tubingen, Germany
[15] AMEOS Clin Halberstadt, Clin Trauma Hand & Reconstruct Surg, Halberstadt, Germany
[16] Friedrich Schiller Univ, Jena Univ Hosp, Dept Neurosurg, Jena, Germany
[17] Regiomed Klinikum Coburg, Dept Orthopaed & Trauma Surg, Coburg, Germany
[18] Univ Hosp, Dept Orthoped & Trauma Surg, Moorenstr 5, D-40225 Dusseldorf, Germany
[19] Univ Hosp Jena, Dept Trauma Hand & Reconstruct Surg, Jena, Germany
[20] BG Klinikum Bergmannstrost Halle, Dept Trauma & Reconstruct Surg, Halle, Germany