Figure 2From: A phase II study on safety and efficacy of high-dose N-acetylcysteine in patients with cystic fibrosis Box and whisker plots for FEV 1 (% predicted) at each of the five study visits. Whiskers represent minimum and maximum values, box represents 25 and 75 percentiles, • represents median values. Visit 3 at the end of placebo run-in phase defines the baseline.Back to article page