1. Orthopaedic Clinic, Department of Surgery, Oncology and Gastroenterology DiSCOG, University of Padua, Padua, Italy
2. Orthopaedic and Traumatology Unit, Department of Medicine and Science of Aging, University "G. d'Annuncio", Chieti-Pescara, Chieti, Italy
3. Department of Anatomy and Human Embriology, Faculty of Medicine, University of Barcelona, Barcelona, Spain
4. Unit of Anatomy and Human Embriology, Universitat Autonoma de Barcelona, Barcelona, Spain