IL1B and incontinentia pigmenti: IL-1β levels in the Con and 0.5 g WJ-HJ subgroups of the CPA-IP group were significantly lower than those in the 0.5 g and 2.0 g WJ-HJ subgroups in the Sal-IP group (Figure 6E, F(7,16) = 3.807, p = 0.013).