1. Department of Trauma, Hand and Reconstructive Surgery, University Hospital Muenster, Westfalian Wilhelm’s University, Waldeyerstrasse 1, 48149 Muenster, Germany
2. Department of Orthopedic Sports Medicine, Klinikum Rechts der Isar, TU Technische Universität Munich, 81675 Munich, Germany
3. Department of Trauma Surgery and Orthopedics, Maria and Joseph Hospital Greven, 48268 Greven, Germany
4. Department of Orthopedics and Trauma Surgery, St. Joseph Hospital, 12101 Berlin, Germany
5. Department of Trauma, Hand and Reconstructive Surgery, Herz-Jesu Hospital, 48165 Münster, Germany
6. Department of Orthopedics and Trauma Surgery, Martin Luther Hospital, 14193 Berlin, Germany