1 Division of Infection, Royal London Hospital, Barts Health NHS Trust, London, UK.
2 Department of Infectious Diseases, Galliera Hospital, Genoa.
3 World Health Organization Collaborating Centre for Tuberculosis and Lung Diseases, Maugeri Care and Research Institute, IRCCS, Tradate, Italy, World Health Organization Collaborating Centre for Tuberculosis and Lung Diseases, Maugeri Care and Research Institute, IRCCS, Tradate, Italy.