In enthesitis-related-arthritis category of juvenile idiopathic arthritis (JIA-ERA), probiotic VSL3# capsules were well-tolerated but failed to show any significant immune (frequencies of Th1, Th2, Th17, and Treg cells in blood, serum cytokines IFN-γ, IL-4, IL-17, IL-10, TNF-α, and IL-6) or clinical effects [117]. Here, IL4 is linked to juvenile idiopathic arthritis.