[1] IST SUPER SANITA, BATTERIOL & MICOL MED LAB, I-00161 ROME, ITALY
[2] IST SUPER SANITA, LAB VET MED, I-00161 ROME, ITALY
[3] IST SUPER SANITA, LAB ULTRASTRUCT, I-00161 ROME, ITALY
[4] UNIV PALERMO, DEPT HYG & MICROBIOL, PALERMO, ITALY
[5] HOSP R SILVESTRINI, PERUGIA, ITALY
[6] PEDIAT HOSP V BUZZI, MILAN, ITALY
[7] UNIV SIENA, INST INFECT DIS, SIENA, ITALY
[8] GEN HOSP TORRETTE, ANCONA, ITALY
[9] HOSP PORDENONE, PORDENONE, ITALY
[10] UNIV PALERMO, PALERMO, ITALY
[11] HOSP ORVIETO, ORVIETO, ITALY
[12] HOSP TREVISO, TREVISO, ITALY