PTPN22 and type 1 diabetes mellitus: No significant correlation was observed between age and neutrophil transmigration in the pediatric T1D patients carrying (HET) or not carrying (WT) the PTPN22 C1858T variant (r = −0.21 and −0.05 for unstimulated and TNF-α-stimulated conditions, respectively) (Supplementary Table 5).