Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Lung Disease 2017 Report. GOLD Executive Summary - Vogelmeier, CF; Criner, GJ; Martinez, FJ; Anzueto, A; Barnes, PJ; Bourbeau, J; Celli, BR; Chen, R; Decramer, M; Fabbri, LM; Frith, P; Halpin, DMG; et al. (American Journal of Respiratory and Critical Care Medicine, 2017)