Fig. 3From: Differences in systemic adaptive immunity contribute to the ‘frequent exacerbator’ COPD phenotypeSusceptibility to Exacerbation in COPD is associated with reduced CD4+ Tcm and CD8+ Tem HLA-DR+. Graphs show the frequency (left) and absolute number (right) of CD4+ Tcm cells in frequent exacerbators (FE) and infrequent exacerbators (IE). Horizontal lines indicate the mean. Each dot represents an individual patientBack to article page