[1] NATL INST HLTH,ROME,ITALY
[2] OSPED SAN GIUSEPPE,EMPOLI,ITALY
[3] OSPED SAN GERARDO,MONZA,ITALY
[4] UNIV PALERMO,DIPARTIMENTO IGIENE & MICROBIOL,I-90133 PALERMO,ITALY
[5] SPEDALI RIUNITI PISTOIA,PISTOIA,ITALY
[6] UNIV CATTOLICA SACRO CUORE,IST MICROBIOL,ROME,ITALY
[7] OSPED CIVILE,PORDENONE,ITALY
[8] UNIV SASSARI,IST IGIENE & MED PREVENT,I-07100 SASSARI,ITALY
[9] UNIV SASSARI,IST MICROBIOL,I-07100 SASSARI,ITALY
[10] OSPED CIVILE,VENICE,ITALY
[11] OSPED SAN BORTOLO,VICENZA,ITALY
[12] OSPED RIUNITI BERGAMO,I-24100 BERGAMO,ITALY
[13] AZIENDA OSPED MORELLI,BORMIO,ITALY
[14] AZIENDA OSPED CAREGGI,FLORENCE,ITALY