[1] Univ Palermo, Dept Hlth Promot Mother & Child Care, Internal Med & Med Specialties G D Alessandro, Palermo, Italy
[2] Azienda Osped Univ Policlin P Giaccone, Infect & Trop Dis Unit, Palermo, Italy
[3] Checkpoint Palermo Fast Track City, Palermo, Italy
[4] Univ Palermo, Internal Med & Med Specialties G ?Alessandro, Dept Hlth Promot Mother & Child Care, Microbiol & Virol Unit, Palermo, Italy