PTPN22 and type 1 diabetes mellitus: Neutrophil counts did not differ between the T1D subgroups (wild-type or heterozygous for the PTPN22 variant) and healthy donor controls (Figure 1D), between the autoantibody-positive T1D patients and healthy donor controls (Figure 1E), or between the heterozygous (C1858T) and wild-type (C1858C) T1D patients and healthy donors (Figure 1F).