1. F. Ferrarello, PT, Functional Rehabilitation Unit, Azienda USL 4 Prato, Piazza dell'Ospedale 5, 59100 Prato, Italy.
2. V.A.M. Bianchi, PT, Functional Rehabilitation Unit, Azienda USL 4 Prato.
3. M. Baccini, PT, Functional Rehabilitation Unit and Motion Analysis Laboratory, Piero Palagi Hospital, Azienda Sanitaria di Firenze, Florence, Italy.
4. G. Rubbieri, MD, Research Unit of Medicine of Aging, Department of Experimental and Clinical Medicine, University of Florence, and Azienda Ospedaliero–Universitaria Careggi, Florence, Italy.
5. E. Mossello, MD, PhD, Research Unit of Medicine of Aging, Department of Experimental and Clinical Medicine, University of Florence, and Azienda Ospedaliero–Universitaria Careggi.
6. M.C. Cavallini, MD, PhD, Research Unit of Medicine of Aging, Department of Experimental and Clinical Medicine, University of Florence, and Azienda Ospedaliero–Universitaria Careggi.
7. N. Marchionni, MD, Research Unit of Medicine of Aging, Department of Experimental and Clinical Medicine, University of Florence, and Azienda Ospedaliero–Universitaria Careggi.
8. M. Di Bari, MD, PhD, Research Unit of Medicine of Aging, Department of Experimental and Clinical Medicine, University of Florence, and Azienda Ospedaliero–Universitaria Careggi.