Boxplot of measured PAUSE TIMES for LEUKOCYTES ROLLING on PSELECTIN at various RearForce values. At each RearForce value, average PAUSE TIME was recorded from 60 simulations that had at least 10 INTERACTIONS (pauses). In vitro, higher values of wall shear stress lead to shorter pause times. This data shows that higher RearForce values also lead to shorter LEUKOCYTE pause times. White circles: median pause time value. Box: lower and upper quartiles. Whiskers: minimum and maximum pause time values.