[1] Azienda Osped Univ Perugia, Clin Malattie Infett, Piazzale Menghini 1, I-06129 Perugia, Italy
[2] Luigi Sacco Hosp, Dept Infect Dis, Milan, Italy
[3] Osped Pescara, Dept Infect Dis, Pescara, Italy
[4] Univ Bologna, Infect Dis Clin, Bologna, Italy
[5] Univ Bari, Infect Dis Unit, Bari, Italy
[6] Univ Catania, Garibaldi Hosp, Infect Dis Unit, Catania, Italy
[7] Amedeo Savoia Hosp, Dept Infect Dis, Turin, Italy
[8] Univ Sassari, Dept Clin & Expt Med, Sassari, Italy
[9] Careggi Hosp, Dept Infect Dis, Florence, Italy
[10] Busto Arsizio Hosp, Infect Dis Unit, Busto Arsizio, Italy
[11] Hosp Univ San Martino Genoa, Infect Dis, Genoa, Italy
[12] Galliera Hosp, Dept Infect Dis, Genoa, Italy
[13] Univ Milan, Infect Dis Unit, Milan, Italy
[14] Manzoni Hosp, Infect Dis Unit, Lecce, Italy