[1] Univ Naples Federico II, Dept Infect Dis, I-80138 Naples, Italy
[2] Univ Genoa, Dept Infect Dis, San Martino Hosp, Genoa, Italy
[3] San Andrea Hosp, Dept Infect Dis, Vercelli, Italy
[4] Univ Complutense, Hosp Gen Gregorio Maranon, Div Clin Microbiol, E-28040 Madrid, Spain
[5] Royal Hampshire Cty Hosp, Dept Microbiol, Winchester, Hants, England
[6] Catholic Univ, Dept Infect Dis, Rome, Italy
[7] Aberdeen Royal Infirm, Dept Med Microbiol, Aberdeen, Scotland
[8] Univ Florence, Dept Infect Dis, Florence, Italy
[9] Osped Riuniti Bergamo, Dept Infect Dis, I-24100 Bergamo, Italy
[10] RJM Grp LLC, Woodbridge, VA USA
[11] Univ Dundee, Ninewells Hosp & Med Sch, Infect Unit, Dundee DD1 9SY, Scotland
[12] Rush Med Coll, Dept Infect Dis, Chicago, IL 60612 USA
[13] Catholic Univ, Dept Surg, Rome, Italy
[14] Hacettepe Univ, Infect Dis Sect, Dept Internal Med, Ankara, Turkey
[15] Univ Roma La Sapienza, Dept Infect Dis, Rome, Italy