1Department of Experimental and Clinical Medicine, Section of Anatomy, University of Florence, Largo Brambilla, 3- Viale Pieraccini, 6 - 50134 Florence, Italy, E-mail: formigli@unifi.it
2Department of Experimental and Clinical Medicine, Section of Histology, University of Florence, Largo Brambilla, 3- Viale Pieraccini, 6 - 50134 Florence, Italy, E-mail: formigli@unifi.it