[1] Ist Super Sanita, Dipartimento Malattie Infett Parassitarie & Immun, I-00161 Rome, Italy
[2] Fdn S Maugeri, WHO Collaborating Ctr TB & Lung Dis, Care & Res Inst, Tradate, Italy
[3] Univ Sassari, Epidemiol & Med Stat Unit, Dept Biomed Sci, I-07100 Sassari, Italy
[4] Ist Sci San Raffaele, Emerging Bacterial Pathogens Unit, I-20132 Milan, Italy