Original Research

Clinical characteristics of chronic bronchitic, emphysematous and ACOS phenotypes in COPD patients with frequent exacerbations

Cheng YS, Tu XW, Pan LL, Lu S, Xing M, Li LL, Chen XW

International Journal of Chronic Obstructive Pulmonary Disease 2017, 12:2069-2074

Published Date: 18 July 2017