ADMA in μmol/L in patients treated with epoprostenol or placebo. No statistically significant differences were seen between the groups. ADMA levels in both groups were significantly higher 72 h, 96 h, and 120 h after trauma compared to the 24 h sample (p < 0.001, Kruskal-Wallis test). Dotted line = 0.25 ± 0.12 μmol/L (the mean ADMA level in a reference material of healthy subjects). For details see legend to Figure 1.