Nontuberculous mycobacterial pulmonary disease: an increasing burden with substantial costs.

Affiliations: Epidemiology Unit, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA. German Central Committee against Tuberculosis, Berlin, Germany. Clinical Epidemiology and Medical Statistics Unit, Dept of Biomedical Sciences, University of Sassari, Sassari, Italy. Director, WHO Collaborating Centre for TB and Lung Diseases, Maugeri Care and Research Institute, IRCCS, Tradate, Italy.