1. Department of Clinical and Experimental Medicine (B.A., E.M., S.B., S.C., E.F.), University of Pisa School of Medicine, 56100 Pisa, Italy;
2. CNR Institute of Clinical Physiology (A.G.), 56124 Pisa, Italy;
3. Institute of Biomedical Engineering (A.M.), 35127 Padova, Italy;
4. Department of Surgery (F.P., G.C., G.A., N.S.), University of Genova, 16147 Genova, Italy