1. Kantonsspital St. Gallen, Orthopaedics and Traumatology, St. Gallen, Switzerland
2. ECOM Excellent Center of Medicine, Munich, Germany
3. Department of Orthopaedics and Sportorthopaedics, Klinikum rechts der Isar Technical University Munich, München, Germany
4. Cliniques universitaires Saint-Luc, Orthopaedics and Traumatology, Brussels, Belgium
5. Rehman Medical Institute, Department of Trauma and Orthopaedic Surgery, Peshawar, KP, Pakistan