Fig. 1From: Ability of procalcitonin to distinguish between bacterial and nonbacterial infection in severe acute exacerbation of chronic obstructive pulmonary syndrome in the ICUPCT levels at inclusion (PCT-H0) (panel a), at 6 hours (PCT-H6) (panel b) and day 1 (PCT-H24) (panel c) after inclusion, in accordance with the documented infection group ***p < 0.001Back to article page