[1] Univ Roma Tor Vergata, Dept Dermatol, I-00133 Rome, Italy
[2] Univ Roma Tor Vergata, Dept Pediat, I-00133 Rome, Italy
[3] Childrens Hosp Bambino Gesu, Div Infect Dis & Immunol, Rome, Italy
[4] Univ Munich, Dept Dermatol, D-8000 Munich, Germany
[5] ANMI ONLUS, Rome, Italy