1. From the Department of Experimental Pathology, University of Pisa, Pisa (A. Paolicchi, A. Pompella); the Institute of Clinical Physiology, National Research Council, Pisa (M.E., C.P.); Azienda Ospedaliera Pisana, Pisa (E.C.); and Clinica Villa Maria Beatrice, Firenze (E.G., G.P.), Italy.