1. BG Traumacenter Tübingen, Department of Traumatology and Reconstructive Surgery, University of Tübingen, Germany
2. Department of Orthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan
3. Shoulder and Knee Unit, Mediterranea Hospital, Naples, Italy
4. Department of Traumatolgy, Helmut-G.-Walter Klinikum Lichtenfels, Lichtenfels, Germany
5. Department of Orthopedics and Traumatology, Klinikum Bamberg, Bamberg, Germany