Global strategy for the diagnosis, management, and prevention of chronic obstructive lung disease: the GOLD science committee report 2019 by Singh, D, Agusti, A, Anzueto, A, Barnes, PJ, Bourbeau, J, Celli, BR, Criner, GJ, Frith, P, Halpin, DMG, Han, M, López Varela, MV, Martinez, F, Montes De Oca, M, Papi, A, Pavord, ID, Roche, N, Sin, DD, Stockley, R, Vestbo, J, Wedzicha, JA, Vogelmeier, C

Current controversies in chronic obstructive pulmonary disease. A report from the Global Initiative for Chronic Obstructive Lung Disease Scientific Committee by Criner, GJ, Martinez, FJ, Aaron, S, Agusti, A, Anzueto, A, Bafadhel, M, Barnes, PJ, Bourbeau, J, Chen, R, Ewig, J, Fabbri, LM, Frith, P, Halpin, DMG, Han, M, De Oca, M, Nishimura, M, O'Donnell, D, Papi, A, Pavord, I, Roche, N, Rodriguez-Roisin, R, Salvi, S, Singh, D, Sin, DD, Stockley, R, Varela, MV, Vestbo, J, Vogelmeier, CF, Washko, G, Wedzicha, JA, Celli, BR