1. StopTB Italia Onlus, Milan, Italy
2. Department of Clinical and Experimental Medicine, Infectious Disease Unit, University of Pisa, Pisa, Italy
3. Regional TB Reference Centre, Villa Marelli Institute, Niguarda Hospital, Milan, Italy
4. Department of Medical, Surgical and Experimental Sciences, Clinical Epidemiology and Medical Statistics Unit, University of Sassari, Sassari, Italy