[1] University Hospital Regensburg,Department of Trauma Surgery
[2] University Hospital Regensburg,Center for Clinical Studies
[3] Charité University Medicine,Center for Musculoskeletal Surgery
[4] Vivantes Auguste-Viktoria-Clinic,Department for Shoulder Surgery
[5] Sporthopaedicum Regensburg,Department of Trauma Surgery, Hand Surgery and Sports Medicine
[6] ViDia Clinic Karlsruhe,undefined