Fig. 2From: Effects of short-term hyperoxia on erythropoietin levels and microcirculation in critically Ill patients: a prospective observational pilot studyIndividual and mean (SD) changes in serum ROS (a) and GSH (b) levels in the hyperoxia group (n = 12), expressed as percentage of baseline values. *p < 0.05, **p < 0.01, one-way ANOVA for repeated measures with Bonferroni’s post hoc testBack to article page