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Epidemiology and costs of chronic obstructive pulmonary disease
K. R. Chapman, D. M. Mannino, J. B. Soriano, P. A. Vermeire, A. S. Buist, M. J. Thun, C. Connell, A. Jemal, T. A. Lee, M. Miravitlles, S. Aldington, R. Beasley
European Respiratory Journal 27 (1) 188-207; DOI: 10.1183/09031936.06.00024505 Published 1 January 2006