IL21 and type 1 diabetes mellitus: Compared to the control group, the T1D group had tendencies (p < 0.05 but > 0.0025) towards higher concentrations of IL-7, IL-1β, IL-8/CXCL8, IL-2, the regulatory cytokine IL-10, and Th17 cytokines (IL-17F, IL-21, IL-23).