Fig. 2From: Immunophenotype in acute exacerbation of chronic obstructive pulmonary disease: a cross-sectional studyProportion of CD4 + T cell subtypes in peripheral blood among groups. Th1 cell (A, B), Th2 cell (C, D), Th17 cell (E, F), Treg cell (G, H), Th1/Th2 cell ratio (I), Th17/Treg cell ratio (J). Data are expressed as mean number of each group (mean ± SD)Back to article page