RT Journal Article SR Electronic T1 Chronic obstructive pulmonary disease: current burden and future projections JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 397 OP 412 DO 10.1183/09031936.06.00025805 VO 27 IS 2 A1 Lopez, A. D. A1 Shibuya, K. A1 Rao, C. A1 Mathers, C. D. A1 Hansell, A. L. A1 Held, L. S. A1 Schmid, V. A1 Buist, S. YR 2006 UL http://erj.ersjournals.com/content/27/2/397.abstract AB