1. Department of Orthopaedic and Trauma Surgery, Campus Bio-Medico University, Via Alvaro del Portillo, Trigoria, Rome, Italy
2. Department of Orthopaedic Sports Medicine, Klinikumrechts der Isar, Technical University of Munich, Ismaningerstr. 22, Munich, Germany
3. Department of Musculoskeletal Disorders, Faculty of Medicine and Surgery, University of Salerno, Salerno, Italy Centre for Sports and Exercise Medicine, Barts and The London School of Medicine and Dentistry, Mile End Hospital, London