1 Department of Orthopaedic and Trauma Surgery, University of Salerno School of Medicine Surgery and Dentistry, Salerno, Italy. n.maffulli@qmul.ac.uk.
2 Centre for Sports and Exercise Medicine, Barts and The London School of Medicine and Dentistry, Mile End Hospital, 275 Bancroft Road, London, E1 4DG, England, UK. n.maffulli@qmul.ac.uk.
3 Department of Orthopaedic and Trauma Surgery, University of Salerno School of Medicine Surgery and Dentistry, Salerno, Italy.