[1] UO Riabilitaz & cura, Div Lungodegenza, I-83050 S Nicola Baronia, AV, Italy
[2] Univ Naples 2, Sch Med, Dept Expt Med, Physiol Sect, Naples, Italy
[3] CONI FMSI, Ctr Sports Med, Padua, Italy
[4] Keele Univ, Sch Med, N Staffordshire Hosp, Dept Traumat & Orthopaed Surg, Stoke On Trent, Staffs, England