Rabe KF, Hurd S, Anzueto A, Barnes PJ, Buist SA, Calverley P, Fukuchi Y, Jenkins C, Rodriguez-Roisin R, van Weel C, Zielinski J; Global Initiative for Chronic Obstructive Lung Disease.
Am J Respir Crit Care Med. 2007 Sep 15;176(6):532-55. Epub 2007 May 16. Review.