1. Institute of Human Morphology Facoltà di Medicina Università degli Studi di Ancona Via R Ranieri, 6 60131 Ancona, Italy
2. Clinic of Dermatology Osp. Umberto I University of Ancona 60100 Ancona, Italy
3. Institute of Histology and Embriology University of Bologna Via Belmeloro 8 40126 Bologna, Italy
4. Experimental Surgery I.O.R. Via di Barbiano 1/10 40136 Bologna, Italy
5. Gentili Institute S.p.A. Via Mazzini 112 Pisa, Italy