1. Department of Orthopaedic and Traumatology, University of Rome “Tor Vergata”, School of Medicine, Rome, Italy
2. Department of Orthopaedics and Traumatology, San Camillo-Forlanini Hospital, Rome, Italy
3. Department of Musculoskeletal Disorders, School of Medicine and Surgery, University of Salerno, Italy; Queen Mary University of London, Barts and the London School of Medicine and Dentistry, Centre for Sports and Exercise Medicine, London, England