[1] Univ Salerno, Fac Med & Surg, Dept Musculoskeletal Disorders, Salerno, Italy
[2] Univ Salerno, Dept Med Surg & Dent, Via S Allende, I-84081 Baronissi, SA, Italy
[3] RWTH Aachen Univ Clin, Dept Orthopaed, Pauwelsstr 30, D-52074 Aachen, Germany
[4] Queen Mary Univ London, Mile End Hosp, Barts & London Sch Med & Dent, Ctr Sports & Exercise Med, 275 Bancroft Rd, London E1 4DG, England
[5] Keele Univ, Fac Med, Sch Pharm & Bioengn, Thornburrow Dr, Stoke On Trent, Staffs, England