1. Department of Arthroscopic Surgery, Sports Traumatology and Sports Medicine, BG Klinikum Duisburg gGmbH, Großenbaumer Allee 250, 47249 Duisburg, Germany
2. Athletikum Rhein Ruhr, BG Klinikum Duisburg gGmbH, Großenbaumer Allee 250, 47249 Duisburg, Germany
3. Department of Trauma, Hand and Reconstructive Surgery, University Hospital, Hufelandstraße 55, 45147 Essen, Germany
4. Research Department, BG Klinikum Duisburg gGmbH, Großenbaumer Allee 250, 47249 Duisburg, Germany
5. Department of Trauma and Reconstructive Surgery, BG Klinikum Duisburg gGmbH, Großenbaumer Allee 250, 47249 Duisburg, Germany
6. BG Kliniken—Klinikverbund der Gesetzlichen Unfallversicherung gGmbH, Leipziger Pl. 1, 10117 Berlin, Germany
7. Department of Knee and Hip Surgery, Schulthess Clinic, Lengghalde 2, 8008 Zurich, Switzerland