Box plots of U-<i>maspin</i> and M-<i>maspin</i> concentrations in first trimester maternal plasma from cases and controls.

<p>The upper and lower limits of the boxes represent the 75th and 25th percentiles, respectively. The upper and lower whiskers represent the 90th and 10th percentiles, respectively. The median is indicated by the line in each box. Outliers are indicated by circles.