1. Department of Orthopaedic and Trauma Surgery, Campus Bio-Medico University, Via Alvaro del Portillo, Rome, Italy
2. Department of Musculoskeletal Disorders, University of Salerno School of Medicine and Surgery, Salerno, Italy
3. Department of Orthopaedic and Trauma Surgery, Centre for Sports and Exercise Medicine, Barts and The London School of Medicine and Dentistry, Mile End Hospital, 275 Bancroft Road, London, UK