[1] Univ Florence, Dept Dermatol Sci, Florence, Italy
[2] Univ Florence, Dept Crit Care Med & Surg, Florence, Italy
[3] Univ Florence, Dept Anat, Florence, Italy
[4] Univ Siena, Dept Physiol, I-53100 Siena, Italy
[5] Univ Florence, Dept Human Pathol & Oncol, Florence, Italy