1. Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
2. Biological Systems Movement Research Laboratory, Pistoia Italy
3. Department of Functional Rehabilitation Activities, Azienda USL Toscana Centro, Ex Filanda, V. Cesare Battisti 30, Pescia, Italy
4. Department of Functional Rehabilitation Activities, Azienda USL Toscana Centro, c/o CSS Giovannini, Prato, Italy