[1] Univ Roma La Sapienza, Sch Med 2, Dept Skin & Sexually Transmitted Dis & Plast & Re, S Andrea Hosp, Rome, Italy
[2] Belcolle Hosp, Dept Haematol & Oncol, Viterbo, Italy
[3] Univ Roma La Sapienza, Sch Med 1, Dept Expt Med & Pathol, Policlin Umberto I, Rome, Italy
[4] Univ Roma La Sapienza, Sch Med 2, Resp Dis Unit, S Andrea Hosp, Rome, Italy