1. Department of Orthopaedic Surgery, Stanford School of Medicine, Stanford, CA, USA
2. Department of Orthopaedic and Trauma Surgery, Magna Græcia University, Catanzaro, Italy
3. Department of Orthopaedic and Trauma Surgery, C.O.T. Cure Ortopediche Traumatologiche, Messina, Italy
4. Department of Orthopaedic and Traumatology, Hacettepe University, Ankara, Turkey