Figure 2
Comparison of the distribution of COPD patients using the GOLD groups A–D/I–IV 2007, 2016 and 2019 classifications. GOLD Global Initiative for Chronic Obstructive Lung Disease.
Figure 2 | Scientific Reports
Comparison of the distribution of COPD patients using the GOLD groups A–D/I–IV 2007, 2016 and 2019 classifications. GOLD Global Initiative for Chronic Obstructive Lung Disease.
