1. From the Department of Normal Human Morphology (G.Z., M.V.), University of Trieste, Trieste, Italy; the Department of Biomorphology (A.P., R.D.P., R.R.), “G. D’Annunzio” University of Chieti, Chieti Scalo, Chieti, Italy; the Department of Morphology and Embryology (A.G., P.S.), Human Anatomy Section, University of Ferrara, Ferrara, Italy; and the Department of Drug Sciences (G.C.), Laboratory of Cell Physiology (S.G.), “G. D’Annunzio” University of Chieti, Chieti, Italy.