1 ATOS Klinik Fleetinsel Hamburg, Department of Shoulder and Elbow Surgery, Admiralitätstrasse 3-4, 20459 Hamburg, Germany; Department of Orthopaedics, University Hospital, Medical Faculty, Heinrich-Heine-University Düsseldorf, Moorenstr. 5, 40255 Düsseldorf, Germany. Electronic address: j-kircher@web.de.
2 Institute of Biomechanics, University Hospital Hamburg-Eppendorf, Lottestrasse 59, 22529 Hamburg, Germany.
3 Department of Orthopaedics, University Hospital Hamburg-Eppendorf, Eppendorfer Landstrasse 60, 20249 Hamburg, Germany.
4 ATOS Klinik Fleetinsel Hamburg, Department of Shoulder and Elbow Surgery, Admiralitätstrasse 3-4, 20459 Hamburg, Germany.
5 Department of Legal Medicine, University Hospital Hamburg-Eppendorf, Butenfeld 34, 22529 Hamburg, Germany.