Figure 1. Plasma IR-ET-1 levels

Plasma IR-ET-1 levels (pg/ml) of the three groups of patients represented as box and whisker plots. The bottom and top edges of the box are located at the 25^th and 75^th percentiles for the sample. The dot inside the box represents the mean. The median (50^th percentile) is shown as a horizontal line in the box. The vertical lines extend from the box as far as the data extend, to a distance of at most 1.5 interquartile ranges. Any value more extreme than this is marked with a plot symbol.