Acid sphingomyelinase serum activity in control and ICU patients.

<p>This figure indicates median pre- and post-operative acid sphingomyelinase serum activity of the control group and median acid sphingomyelinase serum activity of the ICU group on admission. Statistical significant differences between groups (<i>P</i><0.05) are marked with an asterisk (*). The box plots display the minima/maxima (whiskers), 25%/75% percentile (box), and median (−) values. ASM: acid sphingomyelinase serum activity.