[1] Univ Sassari, Dept Med Surg & Expt Sci, Unit Infect Dis, Sassari, Italy
[2] Univ Perugia, Dept Med, Infect Dis Unit, Santa Maria Hosp,Azienda Osped, Perugia, Italy
[3] ASST Fatebenefratelli Sacco, Dept Infect Dis, Milan, Italy
[4] ASST Valle Olona, Unit Infect Dis, Busto Arsizio, Italy
[5] Careggi Hosp Florence, Unit Infect & Trop Dis, Florence, Italy
[6] Univ Milano Bicocca, San Gerardo Hosp, Infect Dis Unit, Monza, Italy
[7] Univ Bari, Infect Dis Clin, Policlin Consorziale, Bari, Italy
[8] Amedeo Savoia Hosp, Unit Infect Dis, Turin, Italy
[9] Univ Bologna, Dept Infect Dis, S Orsola Malpighi Hosp, Bologna, Italy
[10] Garibaldi Hosp, Unit Infect Dis, Catania, Italy
[11] Galliera Hosp, Infect Dis Unit, Genoa, Italy
[12] IRCCS San Martino Hosp IST, Unit Infect Dis, Genoa, Italy
[13] Santa Maria Annunziata Hosp, Infect Dis Unit, Florence, Italy
[14] Univ Milan, DIBIC Luigi Sacco, Infect Dis Unit, Milan, Italy
[15] Osped Pescara, Unit Infect Dis, Pescara, Italy
[16] Sanremo Hosp, Unit Infect Dis, San Remo, Italy
[17] Univ G dAnnunzio, Infect Dis Unit, Chieti, Italy
[18] A Manzoni Hosp, Unit Infect Dis, Lecce, Italy