1. Department of Spine Surgery and Scoliosis Center, Schön Klinik Neustadt in Holstein, Neustadt, Germany
2. Musculoskeletal University Center, Ludwig Maximilian University of Munich, Munich, Germany
3. Department of Foot and Ankle Surgery, Schön Klinik München Harlaching, Munich, Germany
4. Clinic of Veterinary Surgery, Ludwig Maximilian University of Munich, Munich, Germany
5. MZEB der Stiftung ICP München, Munich, Germany
6. Department of Orthopedic Surgery, Agaplesion Ev. Bathildiskrankenhaus Bad Pyrmont, Bad Pyrmont, Germany
7. Katholisches Krankenhaus Hagen, Hagen, Germany