COPD Chronic obstructive pulmonary disease 慢性阻塞性肺疾病 CD4+T cluster of differentiation 4+ T 分化抗原簇 4+T 细胞 CD8+T cluster of differentiation 8+ T 分化抗原簇 8+T 细胞 ACOS asthma-COPD overlap syndrome 哮喘-慢阻肺重叠综合征 ATS American Thoracic Society 美国胸科协会 GINA Global Initiative for Asthma 全球哮喘防治创议 GOLD Global Initiative for