Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease: GOLD executive summary.
Am J Respir Crit Care Med. 2007 Sep 15;176(6):532-55. doi: 10.1164/rccm.200703-456SO. Epub 2007 May 16.
Am J Respir Crit Care Med. 2007.
PMID: 17507545
Review.