Objective (1)To draw a comparison between therapic effects ofdexamethasone(DEX) and erythromycin(EM) in chronic obstructive pulmonarydisease(COPD), and To compare with influences of both on CD4+CD25+regulatory T cells.

• 目的: 比较地塞米松、红霉素对慢性阻塞性肺疾病(COPD)的治疗效果及对CD4+CD25+调节T 细胞的影响。