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 A. D. Lopez A1 K. Shibuya A1 C. Rao A1 C. D. Mathers A1 A. L. Hansell A1 L. S. Held A1 V. Schmid A1 S. Buist YR 2006 UL http://erj.ersjournals.com/content/27/2/397.abstract AB