[1] Univ Palermo, Dept Hlth Promot Mother & Child Care Internal Med, Palermo, Italy
[2] AOU Policlin P Giaccone, Infect & Trop Dis Unit, I-90127 Palermo, Italy
[3] AOU Policlin P Giaccone, Sicilian Reg Reference Ctr Fight AIDS, I-90127 Palermo, Italy
[4] Palermo Fast Track City, Casa Diritti,Via Liberta 45, I-90143 Palermo, Italy
[5] Univ Hosp Paolo Giaccone, Unit Pathol, Viale Vespro 147, Palermo, PA, Italy