Fig. 2From: Airway regulatory T cells are decreased in COPD with a rapid decline in lung functionPart 3: Flow cytometry of BAL fluid from COPD subjects. a Activated T helper cells in (in percentage of T helper cells). b FoxP3+ regulatory T cells (in percentage of activated T helper cells). Data shown as median and IQR. NS not significant, LF lung function. Shown p-value calculated using the Mann–Whitney U-test. See Additional file 1 for corresponding data in tablesBack to article page