Introduction
Chronic Obstructive Pulmonary Disease (COPD) is a chronic inflammatory respiratory disease characterized primarily by persistent airflow limitation.1 In China, the prevalence of COPD is 13.7%,2 with an annual mortality rate reaching…

Chronic Obstructive Pulmonary Disease (COPD) is a chronic inflammatory respiratory disease characterized primarily by persistent airflow limitation.1 In China, the prevalence of COPD is 13.7%,2 with an annual mortality rate reaching…