In Figure 1, we show that iPLA2 activity in immortalized urothelial cells isolated from IC/BPS patients is more susceptible to inhibition with (S)‐BEL than the activity measured in immortalized urothelial cells from non‐IC/BPS patients or human urothelial cells. The gene discussed is PLA2G6; the disease is Bartsocas-Papas syndrome 1.